1-808-222-7376 keithm@hdcproductsinc.com


Hear what our customers have to say about HDC Products devices.

If you would like to speak to any of the authors from the testimonials, they have volunteered to talk with you. Please call Keith who is located in Hawaii at 808-222-7376 to schedule a telephone call.


Since we moved into our new house with an inherited hydrodynamic cavitation system, we thought we better do some research on it and ask the company the merits of the system & what were the service intervals for changing out the consumable filters that accompany the system. I gave a call to the number listed on my device and got a call back instantly from Keith. Keith is quite the expert and very passionate about these water systems as he should be. He gave me the information. We had some issues with the AO filters which are not really rated to be outdoors (plastics withstanding the elements) a few months later and I notified him. Keith offered to come and check it out even on a 3 day-holiday weekend as he was concerned that we wouldn’t have water that week. His level of expertise and dedication is amazing & commendable! I later found out that he was caring for/dealing with a sick/injured person at home during this time. He proceeded to upgrade our filter system as HDC no longer uses the smaller A/O filters to the more robust GE system. Although we still filter the water out of our sink tap due to habit, the times we drank directly from that faucet were totally fine.  We are happy to report a reduction of bacteria/pathogens in this great tasting water. There is no more heavy metal taste as you get with many taps in Honolulu.  The water feels softer kind of like the water I have had in Japan. I feel like it’s contributed to smoother skin & softer hair.  I can truthly say that HDC stands by their decade warranty as is clearly true with the level of service he’s provided us (and we inherited new system, albeit it was fairly new),  I read somewhere that they have NSF-372 certification for this system which is comforting.  Keith mentioned that they have been outfitting large hotel/property corporations with his systems. I can’t remember which large chain it was, but it would be good if most if not all hotels were so informed about their water systems for their guests’ safety & peace of mind. Such a small investment for a big reward. Mahalo!


Neil Narbonne 
HDC Customer | Niu Valley, Hawaii


I installed HDC device and threw a super bowl party after the 5 day break-in cycle was complete. After 40 people spent the night jumping in and out of my 10,000 gallon backyard pool/jacuzzi it was expectedly a bit cloudy, but by the next day (after leaving the pump running) was once again crystal clean and clear! I tested the water and it was completely balanced. Also, no one used my outside shower and prior to installing the HDC Device everyone would use the shower. Couldn’t be happier with our new pool, thanks guys!


Dave Numbers
Hawaii Kai Marina Owner


Back on November 8th I had this installed at my home and absolutely love how it works. The owner of HDC Products, Keith Morrill and I have known each other for 10 plus years and he has been encouraging me to get one of these for the past few years. After learning about the long term affects of just the rust and lead present in most potable water along with all of the other wonderful contaminants I became concerned for my wife and other family members as I’m becoming much more health conscious at this stage in my life. We have been filtering our drinking water for years now with ZeroWater. I definitely find the HDC Structured Water taste crisper. Part of my concern came after learning how much water per day our largest organ, our skin absorbs and it was at that point the light bulb went off that absorbing these heavy metals through my skin can’t be good. After the first shower my hair and skin felt much softer. Living in NORCAL, I find the water to be hard and  my skin gets very dry especially during the winter time and always needing to put on lotion. Which has gotten much better  over the past few weeks. The smell of Chlorine while taking a hot shower is gone and after learning about the long term effects was from breathing this daily was very excited about this. Whether I’m drinking the water during a shower, from kitchen sink or my bathroom sink it tastes great! Planning to have one installed at my family’s home in Hawaii shortly.  My Mom has been very concerned ever since the December 3rd announcement of the Board of Water Supply Shut Down Article came out regarding the fuel contamination.  Definitely would consider this a great gift for promoting long term health with your family, friends and love ones.


Rodney Hurtig
Northern California


I purchased the HDC Products home system 4 weeks ago and I have noticed several great things. The acne on my face has gone away, my coffee tastes really great and the toilet bowl no longer has a ring.

Thanks, Keith.

Bill Saugus Mass
A HDC Products Customer


We like the water system very much.  Taking a shower is a joy, no more slippery feeling but when I dry off and my skin feels clean and smooth.  Also, I notice there are less water spots on our dishes and in the sink, and my windshield glass looks a lot cleaner.  Our grass and plants look greener and healthier, like you said, which makes us very happy.  I happily recommend this system to anyone looking to improve their wellbeing.

Thanks, Keith for answering my questions so quickly.

Jelena D.
Waipahu, Hawaii


The water is really great because we no longer need to wipe down the water from the glass and walls. Also, there is no more chemical smell. Just great!!

Waipo, Hawaii


We are loving the water! We hardly have any toilet bowl rings anymore and spend less time watering the lawn. Plus, our water taste great from the tap. There are many improvements felt in our skin, hair and so on. Thank you.

Honolulu, Hawaii


The water is really great because we no longer need to wipe down the water from the glass and walls. Also, there is no more chemical smell. Just great!!

Waipo, Hawaii


“Awesome product!…My skin feels so much softer and my hair feels wayyy softer…Super nice! Thank you!!!!


Kahala, Hawaii


My hotel in Waikiki has two spas that were being drained every other night. I have not needed to drain them since the HDC Products device was intalled. 50% less chlorine is being used. 


Waikiki, HI


We recently installed an HDC pool unit device at our residence.  For years, my husband complained of skin irritation specifically on his back every time after swimming in our pool or any pool with chlorine in it.  This was an extremely uncomfortable experience for him which kept him out of the pool at times, especially the pool at the gym which seems to be loaded with chemicals.  24hrs after installing the pool device my husband went for a swim.  After exiting the crystal-clear restructured water my husband had no symptoms of any skin irritation.  He commented that his hair felt silky smooth and that he felt no need to rinse off under the outdoor shower. We no longer use chlorine, and our water evaporation rate has decreased significantly.  We never really stop to realize that every time we backwashed our pool filter, we were doing harm to the environment.  Now that our water is clean and chemical free, we’ve hooked a hose up to the backwash line and use it to water our lawn.  Our quality of swim is the best part of this experience however, knowing that we’re helping the environment is a pretty good feeling too.  We’d recommend to anyone with a swimming pool to consider installing one of HDC’s pool devices, you won’t regret it!

Honolulu, HI

Enjoying the benefits of your system!

“Thank you for your referral to Paul Tamura. I’m quite pleased with his work. Enjoying the benefits of your system.


John Fefferis

There is no more chemical smell and the water feels so pure!

We got our home device from Keith about a month ago at our new home for our pool and jacuzzi and we love it ! We noticed right away there is no chemical smells anymore, and the water feels so pure on our bodies. Also my skin is not drying out like it has from typical pools and jacuzzi. We are very health conscious and this has definitely upgraded our lives. We will recommend this easy to set up system to our friends ! Thank you, Keith!”


Amber Ricci and Eddie Riggers EDS Contracting Services.
Honolulu, HI

We love the system!

“There is a difference when taking a shower, the water is drinkable and there are NO visible water spots on my sinks and faucet due to the calcium build up. We love the system!


Mililani, HI

Thank you for our system!

“Congratulations on your new success of being innovative and proactive in developing a successful product for the environment, water and people! I am so happy and proud for you! I am wishing you SO much success in your new area of expertise!

Thank you for our system. We love it! Our skin and bodies thank you!”



Spectacular Results from the Home Filtration System

“The water at the house is spectacular. Bree has noted a dramatic lessening of the drying effects her hair has been subjected to previously. Additionally, the water actually tastes amazing.  We have not once noticed the previously obnoxious chloramines odor that has been prevalent for long. Thank you so much for the installation of this fine product on our home!”


S and B

Whole House Filtration System Installed in Kailua

“Thank you so much for setting us and our daughter’s homes up with your whole house filtration system. I have suffered for years with the City and County water making my skin so dry and itchy. My eyes burned like acid acid when washing my face. Our baby grandson has eczema and we are grateful that with the system installed, it helped clear it up.Our yard and plants love it too. 🙌 We have all benefited and are very pleased!”


Kailua, Hawaii – at her daughter’s home

 Cavitation Device Installed in Home Spa

“Amazing fabulous results! Today, one week after being filled and 1 day after the cavitation device was installed, I went to perform the weekly rinse of the spa filter. The filter was obviously dirty. There were tiny black pieces/bits here and there and parts of the filter were darker and obviously dirty. This has never happened before. So, I treated this as I would the monthly filter clean by replacing the filter with my clean spare. I will soak the well rinsed dirty filter in water and degreaser, where it will remain soaked overnight. Wow! This cavitation device is more than doing its job!! Thought you both would like to know this bit of news!!!!”




PS – I’m using the spa so much more frequently than before. 😊

HDC Portable Spa Unit in Hot Tub Customer

“If you own a hot tub and don’t want to use chlorine anymore, then this is the device for you! The HDC portable spa unit will purify your hot tub’s water and is installed in the plumbing circuit of your spa.”



Longer Lasting Flowers with the HDC Water Filtration System

“After installing the HDC Water Filtration System in our home, my flowers started lasting longer! Your flowers will last nearly 3 weeks after using their water in your home!”



Better Skin because of the HDC Device

“I plan to have the whole house serviced by one of your devices. I awoke in the night and noticed my whole body felt as though it had had a facial. You anticipated correctly that we would seek to have the whole house covered by a cavitation device. Thank you!”



Whole House Water Purifier Installed in Nanakuli

“A big MAHALO to Keith Morrill and HDC PRODUCTS INC!!!! Thank you plenty for providing and installing your patented whole house water purifier in my parents home in Nanakuli. They no longer have to deal with lifting 5 gallon bottles atop their water filter. The water tastes great and feels amazing on the skin after showering. I’m so glad I chose your system over others. Thank you again for caring for our Hawaii nei and her people!!!!”


Nanakuli, Hawaii

Hydrodynamic Cavitation Module  

“When your company was kind enough to offer us the opportunity to field test your new product, frankly, we were flattered. Often times, we see products that are lab tested and never fully field tested until the product is already out to market, and by then it is too late to change any marketing strategies and/or manufacturing corrections.

We have been vigorously testing the device for over 6 months, and now have some pleasant results to report. We have tested this device in some of the most inhospitable pool environments we can accommodate. The water clarity is actually the first thing we noted after we installed the system on a pool and spa that has an unbelievably high usage rate with a wet grotto, water feature and slide. This pool gets far more usage than the average Southern California watering hole and sometimes the owner will have nearly 100 people over and 30-60 adults and children will use the pool over the 6 hours the Owners are feeding everyone in shifts. Secondarily, the level of sanitizer or halogen has dropped almost by 50% and the pH has leveled out and is stable for extended periods of time. Lastly, this is likely the result of the fact that, the total dissolved solids have dropped from over 3000 parts-per-million to less than 1000 parts-per-million.

The most surprising results have been the overall effects on the water features we have tested this product on. We installed the unit on a 38 foot long and 7 foot high water wall that literally gobbles chlorine and has an incredibly high level of evaporative water loss. This water feature was evaporating over three gallons a week in 350 gallons of water. After the installation of the HDC Module, other than Muriatic (Hydrochloric) Acid as a buffer to increasing levels of pH, we have added no Chlorine or other Halogen to this water feature. The water is the cleanest and clearest I’ve seen in my 32 years in the pool construction and service industry.

It is not often that I see products in my own industry that perform as they are advertised or intended. Fortunately, for both of us, this is one such product. We highly recommend the use of this product on all pools and water features, as the simplest, most cost-effective way, to control excessive chemical or halogen sanitizers. Through the novel concept of cavitation, this product uses the flow of water for an effective method of purifying and sanitizing water. We like the fact that, because it has no moving parts, it requires virtually no maintenance and carries a full 10-year warranty. It is apparent that a great deal of thought and hydraulic engineering has gone into this fine product. In conclusion, we also like that as it has been given by NS-50 rating and an IATMO lab testing facility certification.”


Stephen D. Stubbs
President/C.E.O. of Riviera Pools and Spas

For almost 35 years I have been dealing with hives and in the past few years a itchy scalp which I have had multiple tests done to determine the cause.  I had some success with acupuncture but at a non covered insurance rate of $100.00 per visit it became too expensive to keep control over my condition.

Over a year and a half ago I met Keith at a pool show and learned about hydrodynamic cavitation for swimming pools and the benefits of restructured water.  On over the two dozen pools these cavitation devices have shown to reduce chemical consumption, made the pool water crystal clear, and with a simple installation of the device on the return line it couldn’t be any easier.  I even had a customer with a very bad skin problem who is a swimming instructor report fantastic results to her skin with before and after photos.

With further testing and research a whole home unit was developed and I had it installed on my home main water supply line.  Within four months my hives and scalp issues went away, in addition tap water in the whole house no longer had the chlorine smell or taste.  I can confirm this because for the last month without the home unit my symptoms have returned in my new home without the whole home unit installed.

I was so impressed by the pool units and the results shown that I joined the team and began to promote, market, and sell the pool units and now gearing up to sell the whole home units as well.  This is truly a remarkable device and has provided untold benefits to my wife and myself knowing the water we use to cook, bathe, and drink is completely safe, chlorine and heavy metal free. 

This device comes highly recommended for its ease of use and the health benefits as mentioned above.


Travis Schonleber

Before HDC Whole House Water Purification System

After HDC Whole House Water Purification System

HDC Module and Backyard Pool Maintenance  

“When I was originally approached this summer, to see if I was willing to test this new filtration system, I must admit I was a bit skeptical.  However, given the high cost to maintain pools where we live in the Santa Clarita Valley in Southern California, it gets extremely hot in the summer and requires a high degree of pool up-keep, I was willing to give anything a try if it could make my life with our pool easier!  Since the installation of the HDC Module, and the subsequent addition of a variable speed pump to help with maximum water circulation, our large pool has never looked or smelled better.  What a difference this combination has made in terms of water clarity and chemicals usage!

Originally, the pool was set up as a salt-water chlorinating system and then later converted to basic chlorine, both liquid and tablet.  With the addition of the HDC module, saving us hundreds of dollars in maintenance fees and supplies, we have dramatically reduced our chlorine consumption in the process as much as 30% to 50%.  This has made keeping up with our basic pool maintenance, a breeze.  

I just had my water checked by a pool professional the other day, and everything is perfect!  Total Dissolved Solids have fallen over two thousand parts per million, and PH and Chlorine can be kept at minimal levels while still maintaining amazing crystal-clear water quality.

Can’t thank you enough for giving us the opportunity to test this system.  I would highly recommend it to anyone looking to reduce the cost of maintaining their swimming pool, while at the same time achieving cleaner less abrasive water.”

S. Brett Edmondson
Homeowner in Santa Clarita, California

Home and Backyard Pool Water Purification System Customer

“I am totally impressed with the results of both devices I purchased from you. My over the counter and refrigerator filters were not filtering as well as I’d like and they were very expensive. After installing your product, ALL the water in my home is pure and safe now. My shower experience is so much better as well. The shower water is soft and does not dry out my skin and my hair feels great!

The unit on my pool is also quite amazing. My kids and I swim in a chemical free water, plus the water is so clean that a shower is not necessary after swimming.  The technology is truly amazing.

My chiropractic office has your brochures, and I will continue to refer people to your amazing system. Thank you for making my life a cleaner and safer place to live in.

Dr. Thomas W. Mercante
AlignLife of Summerville

We Stand Behind Our Money Back Guarantee Policy

“The water tasted great. I especially noticed it when I brewed my coffee in the morning. Unfortunately my family wanted a different system so we asked to have it disconnected. Keith Morrill of HDC Products promptly gave me a full refund of the water system after it was disconnected.”

– Customer Satisfaction is our number one goal.  While our system has proven to be extremely effective and returns are very rare; they might not be for everyone and we understand that.  Every customer has specific requests, therefore we offer a 100% money back guarantee to give you peace of mind.  We thank Paulette for her honesty and for trying our system. 

Yoshikane, Paulette


I am Dr Michael Anthony Pasquale, A board certified plastic surgeon and chief of plastic surgery at Infinity Life Center. What I am about to tell you if it did not happen to me, I would not have believed it.

For the last 4 years I have suffered from a severe skin disorder which I had never heard of before until my dermatologist made the diagnosis (mainly from a pathology report). It is fairly rare, but common enough that perhaps 500,000 to 1 million suffer from this condition to one degree or another.

There are many theories about this disease. A few factors may contribute to it such as hay fever and in even more rare circumstance hypercalcemia (high calcium in the blood) and lymphoma (cancer of the blood) may be present. The fact is no one is sure, but to the person that has it , it is embarrassing with red nodules on the skin, open sores and a mangy appearance. In fact, my surgical technician one time told me: “If you don’t stop scratching your arms I will take you to the vet”.

As funny as that sounds, there is nothing funny about the disorder. I had researched and searched for treatments around in journals, scientific papers and spoke with many dermatologists. I tried everything from steroid injections, surgery and even anti-depressants as it is thought it may be from a nervous condition

This looking for a cure went on for 3 years, nothing worked. One day I was approached by a friend of mine who was promoting a water purification device and mentioned some people who used it had cleared up their acne. I told him about my skin condition, and he said ‘You know maybe this will work, though he had never heard of the disease before. So they agreed to install the device in my home. What the hell? I was willing to give witchcraft a try if would make my skin condition clear up.

The device was installed and checked for proper function over the next month or so. I really did not do anything different, took my shower, washed my arms and hands and so forth as usual, No treatments, no cremes, I did nothing, as I had given up and just decided to wear long sleeves since it mainly affected my arms.

Well to my surprise I started to notice my skin on my arms started to clear up. At first, I noticed a decrease in the skin nodules and sores. As 3 months of using this unique water filter I noticed they 99% were gone. Why this occurred I am not sure have some ideas, but this will deserve further study.  It may be the removal of certain toxins or minerals in the local water or perhaps some form of interaction of type of water molecule that the device produces. Yet whatever it is it worked for me.

Unfortunately I don’t have a lot of before pictures as who wants to take photos of ugly arms. However I foun some before use of the HDC whole house water purification system and was rather amazed as when compared to after 3 months.

Well I will let the company explain the technology, but whatever the magic is it worked for me. If you suffer from such skin condition as Prurigo Nodularis or perhaps eczema this may be worth a try and give it some time. The water taste pretty good and its nice to know that insecticides, some harmful minerals and other toxins are removed as well. Oh and there is one side effect I noticed. My glass shower no longer has water spots like it once did , which were so difficult to remove. That in itself has made it worth it to use this device.

I have never given a testimonial before but this one I am actually happy to do so as the HDC whole house water purification system has truly helped me. As surgeon who has been involved in research for stem cells, reconstructive surgery and the like this will be my next project to understand the science why this worked so well.

Dr. Michael Anthony Pasquale

Chief of Plastic Surgery, Infinity Life Center


I wanted to give you an update since the HDC device was installed on both my swimming pool and Jacuzzi. The sunscreen slick that used to sit in the corners of my pool have disappeared and the water looks amazing! Tenants and Owners have commented on the increased clarity and even noted that the water feels different. The jacuzzi used to be dumped on a daily basis and refilled. We haven’t needed to dump the Jacuzzi once since your product was installed which is saving us from wasting thousands of gallons of water and employee time. Thank you again for introducing me to this amazing product. Mahalo.

Nate Steele A.R.M

General Manager, Hawaiian Monarch

If you would like to speak to any of the authors from the testimonials, they have volunteered to talk with you. Please call Keith who is located in Hawaii at 808-222-7376 to schedule a telephone call.


We had HDC PRODUCTS install the home and pool system. Great plumber, great service! We have noticed our water now leaves no water spots on our showers, cars, and windows, and our lawn is greener. This might just be me, but I’ve noticed that I use 1/4 of the shampoo that I used to. I had black mold and was told I could not get rid of it. After installing, no more black mold! We also have properties in Washington, Leavenworth with a well, which we are now setting up, as this product works great with wells. Unreal – this product WORKS.

Larry Grasse

Home Owner


Good, the water looks clear, less spots especially on glass items. Like the compactness of the whole house system. Clothes feel softer. The only thing is the house pipes are cleaning out and the oldest faucets leaves a metallic taste compared to the other faucets. The newer faucets were changes within last 2 years, the water taste better than the oldest. Have plans to change all faucets in our upcoming renovation of the kitchen and both bathrooms Doug. 


Home Owner


It’s Great 👍 the taste is great too. It is also feels soft too. Thanks 😎 

Gary Walden

Home Owner


My wife and I are very close minded to western medicinal remedies.  We’re always looking for homeopathic solutions whether a more vegan diet…refined essential oils…filtered water…etc.

When we first heard about hydrodynamic cavitation…skepticism was our first reaction…

But since my wife has had an unresolved skin condition….any possible solution would be welcomed.

My wife’s skin condition has improved and I personally drink literally gallons…even our garden plants seem to be happier!

Home Owner


My wife said to me the other day, honey do we still have the system for the water in the house to I replied yes why she replied my skin has become rough and no longer soft.  So I wanna head and change the cartridge filters inside the system and 2 days later my wife syud my skin is softe and smooth again what changed and I told her I simply changed the filters.

When the filters become saturated the quagulated metal will re-enter the water in the home. 

John Curiciuo

Home Owner, Lynnfield MA


Great no problems love the system I did spread the word about the system thank you 

There is a difference when taking a shower, The water is drinkable no visible water spots on my sinks and faucet due to the calcium build up 

We love the system 


Home Owner

Great no problems love the system I did spread the word about the system thank you there’s a difference when taking a shower, the water is drinkable no visible water spots on my skins and faucet due to the calcium buildup we love the system the water is great I’m enjoying my system I just change out the existing filters. This is a great system thank you aloha

Home Owner


The water is great. Im enjoying my steam. I just changed out the existing filters. This is a greatesystem. Thank you. Aloha 😎

Home Owner


I am I am very extremely happy with the water system. My skin is less dry since using it. My hair is soft with less build up. Are used to a clarifying shampoo every week to get rid of the buildup in my hair, and I no longer need to. The water taste better. It is pure and clear, and we no longer use any bottled water 

Rose Donovan

Home Owner


I wanted to let you know of the spectacular results I have seen in my pool following the installation of the HDC Products pool device. I will be honest that I was very skeptical at first. I had never heard of the science used by the product. I also couldn’t find much documentation on-line about the HDC Products device either. I did find some pool servicer blog posts that shared my skepticism.

I am happy to report that this product is the real deal. It works – period.

I have a 43,000 gallon pool that has always been impossible to maintain. Not only does my pool have a natural rock formation cascading to the floor of the pool, but I also have a large Kiawe (Hawaiian Mesquite) tree that constantly showers small leaves into the pool. I also keep my pool heated to 89 degrees. The combination of these factors, along with using a salt system, has resulted in constant algae problems, and cloudy water. Too many times I have had to add extra chlorine during the summer months. I have also required the use of phosphate removers to help get the water clear. And to be honest, despite all of that, I didn’t think my pool looked too bad. That was another reason why I was reluctant to add an “unproven” piece of equipment.

Within the first few days following the installation of the HDC device, my pool started to transform. What I thought was clear water before was nothing compared to how the water looks now. The pool water looks almost perfectly clear in nature. I have never seen the water that clear before, except for the day we filled the pool. I can stare at the deep end of my pool, and it looks like there’s no water in the pool at all – that’s how clear the water is. That’s pretty incredible, as the deep end of my pool is over 12 feet deep. I have also noticed areas that algae grew, no longer exist. Since installation, I have not brushed the walls of my pool. The rocks in the pool always had algae issues. After just 10 days of the HDC Products device installed, I stared to see areas of rock completely absent of algae that was there prior – all without brushing or adding additional chemicals.

I know there are many who will share my initial skepticism. A device that doesn’t use chemicals, doesn’t use any electrical source, and doesn’t wear out, is somehow going to allow my pool to look better, smell better, and end up using less chemicals in the process? That is a very tall order for any device. Yet, somehow the HDC Products device does it. I’m now convinced that the HDC device process of momentarily super-heating the water passing through it is doing two important things for my pool water. First, it is destroying the phosphates that has kept my pool cloudy for years. Second, it is killing the food supply the algae needs to grow. With both of these gone, my pool has never looked as good.

I know even after someone reads this letter, they may think I’m lying, or somehow this can’t be true. For those of you, I tell you the HDC Products device will work for you.  If it could do what  it did to my pool, it will easily do wonders for your pool. And if you want to know if I’m a real person, I’d be happy to speak to anyone and share the progress pictures and video of my pool transformation.

Alan Van Zee

I live on the Big Island of Hawaii and we have a catchment systems which means we rely on the rain for our water.  November of 2019 I installed a HDC unit and immediately noticed a major difference.  The water was tremendously better, the showers, doing the dishes and even the ice tasted better, we were very happy. After a week something amazing happened. I have scalp psoriasis and noticed that it had nearly disappeared. A couple more weeks and I could no longer see it or feel it. It was beyond belief. 

In February I had to go on a month long business trip and shortly after living in hotels I saw that the psoriasis was returning. After three weeks it was completely back, I was shocked and could not get home fast enough. Well I have been back home for two weeks now and it is gone again. I tell everyone about HDC  and hope they make a portable unit so I can take it on all business trips and vacations.

Christian Laxton

I installed a HDC Device in my pump facility for my 1,200 gallon Koi Pond. I had an existing 1-hp variable speed Hayward pump, an Aqua ultraviolet and a Ultima II bio mechanical filtration system. During this time my house was under a serious remodel and addition building phase. Needless to say my pond varied from green to brown and I was continually testing water quality and adjusting. Fish were taking a beating.

After I installed the HDC device, it took 12 hours to have an effect, and within 24 hours, the pond was crystal clear, without killing any water lilies, fish or my Turpin. It has operated like this for the last six months with no exceptions. I add no chemicals, I do backwash once a week. The fish have grown substantially and are healthier in color, eyes and skin. I have cleaned the HDC Device once in this time, last week and found very little debris in the tube.

This has greatly improved the pond quality and my hassles.

Nick Youngleson

Oahu Hawaii

Before HDC device

After HDC device

I continue to see noticeable improvements after installing the HDC Device in reducing the amount of algae and enhancing the clarity of the water in my Koi pond. Also, I have cut in half the number of times I need to backwash the filters. Although, I still don’t understand how it works I would without hesitation recommend this tool to people who want to create the best possible environment for their Koi.

Bob Armstrong

Armstrong Builders

If you would like to speak to any of the authors from the testimonials, they have volunteered to talk with you. Please call Keith who is located in Hawaii at 808-222-7376 to schedule a telephone call.

My eyes, skin, and hair are so happy 🙌!
I haven’t taken a long hot bath in years as it makes me more itchy all over🥴!
Today I chanced it and no itch or blood red eyes.
I’m also not putting lotion on my whole body twice a day🙌🤙💖🙏🤗!
My hair seems more conditioned too. Not dry looking🙌

from Kailua


from Kailua

The water turbidity after installing the HDC device was crystal clear. It made the water sparkle and the owner sees his fishes true colors, vividly. What shocked me the most was the green and the string algaes, which are troublesome, reduced to almost none after the third week of testing and the pH levels were balanced without me doing much to the condition of the water. It was easy to install and the maintenance lessened as well, allowing me to focus on managing the health of the fishes and the ponds ecosystem.

As a seasoned Koi and Goldfish and pond manager having the HDC device that works natural with the environment and simultaneously reducing the task and cost of these ponds makes all the difference.

I highly recommend this device to every Koi fish hobbyist and farmers.

Dean Seto

Owner, Hawaii Koi & Ponds

The HDC device did the work of the chlorine and it overachieved, given the fact your pool had no chlorine in it (and the water quality was excellent).

Your existing chlorine injection system has a sampler or device that checks the amount of algae and bacteria in the pool water, after installing the HDC Device it did not see the need to inject any chlorine or acid.  The reason is simple, when the sampler does not find any algae or bacteria in the water it does not inject chlorine.  Great news for the HDC device; on one hand, but we are not in compliance with California’s minimum chlorine levels for public swimming pools; again, a great accomplishment for the HDC device.

As discussed we had a very impressive improvement to the air quality inside the pool and spa area, again great for the HDC device.  When we installed the HDC device on the spa we will then accomplish an even greater improvement to the air quality of the area as the spa is still using 100% chlorine.


Per our conversation, I think this product would be a great Value Added Service for your Hotel & Military Clients.  Below please see the results which occurred at the Embassy Suites in Burlingame where I work in  less than 30 days.  This property spends roughly $20,000 a year on chlorine & chemicals for their pool and spa. The HDC Unit delivers an estimated savings between 60% to 80% and the color, clarity and lack of chlorine smell are very impressive (more a factor for indoor pools & spas).  Now just imagine how appreciative your customers would be with that value added proposition for 2019?  Might this possibly be an opportunity for them to reallocate those already budgeted dollars (hotels have finalized their budget for the year or will shortly) into a Landscaping project?

When you speak to Keith he will explain to you the Environmental Benefits from not having to backwash pools and dump that chlorine water into the drainage system. As the military is very big on LEED Certified Buildings this must fall under the guidelines of reduction or Water as well as reduction of chemicals put into the ECOSYSTEM. (The benefits to the Reefs and Islands Wells being contaminated from runoff) 
Keith is currently working on an analysis of how much water a year is saved and the dollars that translates into. 

Other applications:

  • Water softening (No more expensive Salt Treatments)
  • Applications both commercial & residential, water composition is transformed and requires less water while delivering an incredible smooth and silky feel (Hotel, Military, Hair & Spa, Home application)
  • Reduction of Algae & Scale buildup in Air conditioning systems (Tremendous annual repair expense as long as Long Term Capital Expenditure for replacement)
  • Water areas on golf course that have green water can be converted to clear and beautiful water!(Keith please discuss with Bob about the how the insects and birds are reduced by this)
Rodney Hurtig

Since installing the HDC water product, after about 4 days  the stains on my tub have gone, my skin is cleaner and feels much better, when I shower the soap falls off right away with a cleaner longer lasting feel. and the ice tastes much better!

David Gaudet


About 6 months ago I pulled a permit and obtained 125 gallons of water from the Ala Wai Canal near the Ala Wai Golf Course and Kapahulu, the worst spot.  I took it to my lab that consists of a normal pool pump, filter and a 90 gallon tank.  I ran the water thought the same HDC Device we install on pools, spas, fountains and Koi Ponds and the results are attached.

We ran the water through the system 15 times to get it this clear, the terrible smell went away after just 2 laps, I watched it with my own eyes and still don’t believe it!

The conclusion of the test was the once filthy Ala Wai canal water now looked great, smelled great, and yes, I drank the water! 


HDC water experiment

The photograph above shows the simple swimming pool pump, filter, and HDC Devices water tank including the mixing bypass used to clean the Ala Wai water above.


Keith Morrill

Inventor, Founder, Patent holder, and NSF Certificate Holder , KD Enterprises Inc

Hi I’m Carla Cummings have had this water system in my house For about three weeks now I have used less dish detergent in my dishwasher. I also use less detergent in my washing machine. My dishes in my dishwasher come out so much cleaner. I also have eczema on my ankle which is pretty much gone and my Face and skin feels like a baby, I now hardly use any cream on my body, I believe in this product it’s absolutely amazing!!!

Carla Cummings

If you would like to speak to any of the authors from the testimonials, they have volunteered to talk with you. Please call Keith who is located in Hawaii at 808-222-7376 to schedule a telephone call.

I have been a boat owner for over 15 years and I have always had the problem of my freshwater smelling really bad.

Knowing the properties of structured water, I filled my freshwater with the HDC device and the results were fantastic, no more smelly water AT ALL!!


The pool water is good. Chlorine smell is absent, the atmosphere inside the indoor pool room went from smelling like chlorine to being completely cleared up in just 3 days. Chemicals  staying at steady levels.  We previously had a reddish brown ring around the waterline of the pool for 40 years, after installing the HDC Unit 12 days later is it 100% gone and gone to stay!  Thank you for allowing me to test and use this incredible device, it has changed my job description for the better. Most of our guests ask what we do to the water to make it so clear and soft. I have also noticed that much fewer Guests shower after exiting the pool noting that their “Hair and skin fells as if it has been conditioned.”


Howard Johnson, Pennsylvania

I installed this product on my built-in swimming pool last summer and I could not be happier with the results I obtained! About two days after install I noticed that the water appeared to be clearer than it had ever been in the past. Regardless of the chemicals I used and money I spent, the water had never been so clear and clean as it is today simply by installing this product. The chemical usage for maintenance has been reduced to almost nothing and the algae build up on the walls has ceased. Having two teenage kids the pool gets used quite a bit and HDC Products Pool Device has lived up to its billing and more! My daughter was away for a couple of days immediately following the install, when she came home and went outside, she said “Wow, the pool looks amazing!” I had yet to explain to her that I had installed the HDC Device while she was away. She immediately jumped in and responded with, “Dad the water feels so soft, what did you do to it while I was gone?” For a teenager to notice such an improvement in water clarity and structure speaks volumes as to the value of this product. It is super easy to install, requires no maintenance, reduces my chemical cost and usage, and reduces my maintenance time that allows me to spend more time enjoying the pool rather than working on it. If you own a pool I highly recommend this product, you will not be disappointed!


My sister Marina has had eczema since 2013. Her symptoms include excessive itching, redness of skin, infections, and swelling. She started to regularly apply lotion to the affected areas in 2017. Her symptoms have gone away for the most part but the scar marks due to her condition over the years still show. Since we installed structured water throughout the house in February, her scar marks have almost completely disappeared and she got rid of her daily lotion routine. She has also experienced softer hair and less acne on her face.

My mother Keiko has also experienced her hair getting softer, at the amazement of her beautician.

I (Masa) came back from my trip to Vegas with extremely dry skin on the back of my hands. Because of this my skin kept falling off from constant itching and scratching. After learning about the healing powers of structured water and installing the HDC device to our main water supply, I took long showers in hopes of healing my hand’s dry skin, as well as rejuvenating the rest of my body. As anticipated my hands were back to normal after one week and my skin has never felt better.

Masaru Kawaharada

This water filtration system has been wonderful for me in so many ways. The initial benefits were felt on how clean my skin felt and how clean I felt after I bathed. I canʻt explain the feeling. My hair has become softer. 

After time I saw that my washing machine smells better and my clothes are cleaner. 

I feel like my dishes are easier to wash. After time my washing machine seemed to be cleaned, smells better and my clothes are cleaner. Even my toilet doesnʻt get dirty like it used to. Its like the water just really cleanses everything by being so pure.

Rosemary Duarte

My grandma installed a new system on her in-ground saltwater jacuzzi. We can go under the water now and our eyes do not burn. My skin no longer gets itchy from staying in for long periods of time. I actually come out feeling cleaner than taking a bath. 

Kalia Keawe

If you would like to speak to any of the authors from the testimonials, they have volunteered to talk with you. Please call Keith who is located in Hawaii at 808-222-7376 to schedule a telephone call.

We recently installed the water system and there has been a noticeable difference in our household water. The biggest difference for me has been for my scalp psoriasis. Since giving birth to my first child in 2016, I have been dealing with uncontrollable scalp psoriasis – I have gone to see a doctor, prescribed medication, used organic shampoos and conditioners and even holistic remedies but nothing worked. I didn’t think anything of the new water system in regards to my psoriasis but after the first week I noticed that my scalp was no longer itchy and that I couldn’t visibly see the psoriasis without really examining my scalp. I am shocked. The only variable that has changed is the water that my scalp was in!!!

Manu Noa

Marina has had eczema since 2013. Symptoms include excessive itching, redness, infections, raised skin. Haven’t had these symptoms (flare-ups) since 2017 when she started using lotion. but always had this dark mark on her thigh, like a scarring where she used to have irritated skin. Since we installed structured water in our house, she has experienced softer skin, completely got rid of using the lotion, and her scar has completely healed. Also acne management has gotten better.


I live in a rainforest on the Island of Oahu, Hawai’i. My domestic water is collected on my roof and needs to be disinfected of bacteria and viruses. Recently, I installed the water purifier from HDC products my water is crystal clear feels very nice in the shower and cleans my dishes extremely well. It also tested better than City and County water. Amazing product!!


5 weeks ago my 83 year old patient was forced to move from his home due to a plumbing issue. He since has moved into a home with the Whole House Water Purification System and We Cannot believe the differences we are experiencing. My patient has shown an increase in energy, he is sleeping better, his hair and skin has improved dramatically. He has many liver spots that are fading away! I wash my hands frequently and my skin is so much healthier.


I installed the HDC water purification system in my house when I felt the difference at our neighborhood association pool. We are really happy we did because my hair is never felt softer and I can feel the difference with my aging skin. I highly recommend you give it a try, you’ll never go back to untreated water again.

Mark Elwell

I live in Honolulu and installed a HDC Products Device 9 weeks ago and we did the normal weekly maintenance at that time including adding Salt and wall scrubbing.  We also adjusted the chlorine generator from 100% to 20% and let the Unit run for a few days.  The quality and clarity of the water after just 2 weeks was beyond my expectations.  We have not backwashed the pool (saving Hawaii’s fragile reef system) and saving labor and expensive water, we have not had to scrub the walls either so the finishes will last longer. 

Swimming the pool is a completely different experience now, I no longer wear goggle to do laps, the walls and floor are so clean the squeak.  The water is free of nearly all chemicals now and feels great and is invigorating.  After a swim  in it you feel as if you put on hair and skin conditioner.

I experimented and unplugged the chlorine generator 3 weeks ago, change the pool pump run time from 8 hours per day to 12 hours and the pool is still the best it has ever been in my ten years of ownership.

I highly recommend you call HDC Products and get one for you own.


I have been going to Keith Morrill’s house for years. The Morrill family are good people and great friends. Keith is always the one to host friends and family gatherings and sporting events. We always end up outside talking and watching the kids in the pool. Being the considerable host he is, the pool is always kept clean for the kids. With that there was always a heavy chlorine smell and the water was a little hazy so I always considered the pool for the kids. I had to leave the island for a business trip. Several months later I returned home and went to Keith’s for a football game. I walked out back and immediately saw a change in his pool. It was crystal clear and no smell. Then I noticed that his wife was in the pool and that was something I had never seen.

I asked and he said he installed a new HDC system that cleans and makes the water feel better than I could imagine. I jumped in and he was absolutely correct. I had to give it a full test and swam under water with my eyes open, came to the surface and no burning or itchiness, and the water really felt great. I got out and felt refreshed and did not even use a towel, just dried under the sun and there was no film or dry feeling whatsoever. I was amazed have told everyone about this HDC product. I also always bring my swimming trunks when I go to Keith’s house.

David Gonzalez

Comercial Finance Broker

If you would like to speak to any of the authors from the testimonials, they have volunteered to talk with you. Please call Keith who is located in Hawaii at 808-222-7376 to schedule a telephone call.

Our family has been renting the same house in Hawaii for the past several years, for 6 month each year. On our last visit, the owner had installed the Pool Tiger just before we arrived. He didn’t even have to mention it to us, we noticed the difference ourselves immediately! No chlorine smell or itchy skin. Especially for the kids who spend hours every day in the pool – no burning eyes! The pool guy would only come around every 3-4 weeks to check on things. Before, he would be there every week and Murphy’s Law, he would usually show up just as we were jumping into the pool. Everyone would have to clear out and wait several hours before going back in, or deal with burning, red eyes! The water quality difference was incredible!

Raj Kapoor

Since we’ve installed the filters I have noticed that my skin is not as dry after showers and no residue of lime deposits in the toilet.  Our water taste better out of the faucets and my son’s back acne had calmed down significantly.  The acne is not totally gone but the flare ups are less and the redness has been considerably less.  I feel the water has made my skin more supple and able to absorb my skin care products better.  This product is such a life saver that I didn’t realize I needed.  It has surpassed my expectations of what I was expecting and will keep you posted of more changes as they come up.  Thank you for such an amazing product and look forward to new updates.


Poliala Lorenzo

Phil and I are very excited about the HDC Products line and keen to be part of your HDC Products family. We are looking forward to meeting you when you are here and discussing next steps.   As for the spa, we are moving forward into the warmer months, as the hot season is the worst for my son’s eczema, thank you, even in the Australia heat his eczema has dissipated 90+%.  He is now able to sleep through the night and his school work has improved along with his self-confidence!



My name is Zachary Yamasaki L.Ac.  I am a licensed physician for over a decade.  Water is essential for life. Most health conditions can be improved somewhat by simply raising the quality of water and air with which we come I to contact. The sensation of swimming or external contact with structured water has the effect of leeching out lactic acid in the muscles furthermore this water used internally can help purge toxins and heavy metals in the body. Better skin, better sleep and less stress are possible with the hydrocav.
Be sides the smooth silky feeling on my skin, i noticed that our tub and shower curtain doesn’t get the black or algae build up. Cups looks clear, utensils look spotless. I even feel kind and Peaceful. Relaxed.


Zachary Yamasaki, L.Ac.

I’ve lived in Arizona for 25 years and the water here is not good.  It dries your skin, hair, it has chemicals in it that is bad for your pipes, clothes, leaves water spots on dishes and glasses and always spots on your faucets.  For years I purchased water softeners from Home Depot.  I thought it was good for my skin, hair, clothes, etc. but now I know it’s not.  I had to add salt on a regular basis and the salt is not good for anything especially drinking it!

I had a HDC system put in my home and it is amazing!  

  • No more water spots on glasses, dishes, etc.
  • No soap scum on shower glass doors/shower walls
  • Softer hair and smoother skin (don’t even use skin creams anymore)
  • Drinking water tastes delicious – no more purchasing plastic water bottles (better for the environment!)
  • Laundry comes out feeling fresher and softer – no more fabric softener and no more sheets for the dryer

The most important it removes bad chemicals and no more chlorine!

In the long run my Husband and I will save money on electricity and salt he will no longer need to lug 40 pound bags of the salt, and we gained some space in our Garage.

I recommend this system to everyone – best investment for my home.



If you would like to speak to any of the authors from the testimonials, they have volunteered to talk with you. Please call Keith who is located in Hawaii at 808-222-7376 to schedule a telephone call.

I teach swimming and I am in the pool 6 hours a day or more during the spring and summer months.

I had spent several thousand dollars on doctors and skin products trying to alleviate my skin itching and bruising from scratching so much. I found out about the HDC Products device and immediately was ready to try anything no matter what the cost. I am so glad that I did, because after about 2 weeks of installing the device onto my filtration system I started noticing a difference. I found relief from my skin issues. There was a noticeable difference in the feel of my skin and the water was so clear. I will continue to use the device on my filtration system as it has dropped my Chlorine usage/needs, my skin has healed and the kids love it also.


Marsha Fabiano MS/PPS

I am the owner of Aqua Blue Enterprises, LLC and started in the pool industry in the state of Hawaii in 1981 as a service company caring for over 100 pool accounts a week.  Three years later I obtained two contractor licenses in the state to repair and build swimming pools until selling my business and going to work with one of the states largest commercial pool builders as their superintendent for mechanical.  During my time as an owner then superintendent for construction in the pool industry I had to be familiar with mechanical operations, equipment specifications, layout, installation of pool support equipment, and water chemistry. 

From the time I began I attended classes in water chemistry and seminars sponsored by equipment manufacturers, trade show schools, became a certified pool operator, and trained pool owners and resort chief engineers and staff on the proper operation of equipment and pool water sanitation.  Many installs consisted of secondary forms of sanitation such as UV and Ozone which are very effective in keeping people safe while swimming in the pools.  Of course, both methods mentioned above had pros and cons which I quickly learned in order to operate the equipment properly.

Then in November of 2018 at an international pool show in Las Vegas I met Keith Morrill who was introducing a product that operated on the principal of Hydrodynamic Cavitation which caught my interest and attention as it was a very simple device which did not require external electric power to operate and showed promise for its intended use. 

Keith gave me a unit to install and evaluate which showed it did a number of things very helpful to maintaining swimming pool water such as reducing chlorine consumption and removing heavy metals such as lead, iron, copper, zinc some other minerals.  Wanting more documented information and testing Keith sent a spiked water samples and units to certified testing labs who then did their own in -house testing which produced and showed what had been advertised all along.  Now with certified lab results in hand I began selling these units to pool service companies in southern California with fantastic results and a sense of certainty the device would work.  I have seen first hand how the device can turn green unsanitary water into crystal clear inviting water in swimming pools in just a few days with proper turnover rates.

For the past year Keith has continued testing the units and has set up an in-home testing system so as to discover what else is possible and how this device can also improve the quality of water coming into a home, business and other domestic water uses.  We have shown how we can eliminate chloramines and the chlorine smell when water districts add ammonia and chlorine into their systems which force home owners to purchase expensive units and bottled water to cook with and drink.

After a certified lab test showed the device could remove detected lead in a sample to nondetectable Keith felt very confident he could help communities with potable water issues with heavy metals especially lead and continues to this day testing more possibilities in ways that benefit the end user.  Keith has learned a lot and spend huge amounts of his own money to get to this point.  Once NSF is approved with his units, I feel very sure that we will be able to expand uses for this product into many areas where water is a concern.


Travis Schonleber
Owner, AquaBlue Enterprises, LLC

I recently moved to a new home in Kahala. The couple who owned the apartment showed us around; the first thing I noticed in their home as I walked in is how crystal-clear and clean their pool and jacuzzi was. I could tell there was something different about their pool, so I asked them what their secret was. They told me about the HDC Products device, and its inventor, Keith.

The HDC Products device filters the pool naturally and reduced the chemicals (chlorine) required by 80%. The couple said they started using the product at Turtle Bay Resort and the feedback has been excellent. They let me swim in the pool with my friends and I was convinced that this device would change the world, especially in the hotel and resort industry.

The next time I used the pool, I also noticed there was no smell of chlorine, which is a plus because I have a hard time breathing when I smell pool chlorine. I stayed in the pool for at least an hour. After my third swim, I noticed my skin and hair feeling smoother.

I would highly recommend the HDC Products device! 


Happy Customer

The Resident Manager at Kuilima Estates West currently has three pools he has installed this device on. In 2017, he spent over $17K in chemicals to keep his pool clean.

Since installing this device (approximately November 2017) he has spent a little over $400. Kevin believes that this cost will be reduced even further.


Gene Peles
Director, Management Executive, Hawaiiana Management Company, Limited

I installed the HDC pool device at my indoor pool in New Mexico. It has been over 3 months now and I have barely had to put chlorine in the pool. This has greatly reduced the toxic fumes that were created from the smell of all the chlorine I had to use before. I have saved money on chemicals and saved the health of my family from breathing these fumes. I highly recommend this wonderful technology!



If you would like to speak to any of the authors from the testimonials, they have volunteered to talk with you. Please call Keith who is located in Hawaii at 808-222-7376 to schedule a telephone call.

We are plumbed in again at our new condo!

Looking forward to pure can water again!!

There is a noticeable difference in smell and taste of our shower and tap water currently which is why I wanted to have the unit installed ASAP. 

My scalp and skin is slowly improving with my daily showers. The damn thing works!


Travis Schonleber
Owner, AquaBlue Enterprises, LLC

This water purification system is awesome, the filtered water does not leave any hard water spots on our customers vehicles and helps them shine even brighter.

We did a test our own vehicles and let the filtered water air dry in the sun without wiping it off, our cars were spot free.


Kurt Yoshikawa
McKinley Car Wash

 I have been using  the HDC products in my home and in my pool. My home unit makes my skin feels soft and moist, and I don’t have to use lotion when I get out of the shower. I also noticed that my hair is not dry and brittle.

One thing that I have found really amazing is that my cut flowers in vases using water that was treated by HDC lasting longer, and the water in the vase does not get yucky, slimy and moldy.

I love having the HDC device treat my pool water much better than salt or chlorine. Like my shower, coming out of the pool, my skin and hair does not feel dry and brittle. Furthermore, my eyes do not burn while swimming so I can spend more time in the pool.

I recommend HDC products to everyone! It is such a great device – well worth the (low) cost!



After installing the HDC system and cleaning out the remaining water we had in our water lines and 50-gallon water heater, we have experienced noticeable changes in our hair, skin, grass and plants.

My mother had rashes for years. After showering with water from the HDC system over a period of a couple of weeks, her skin rash has dissipated almost completely, and she no longer has to use creams to soothe her itchy skin. My son’s acne has also completely disappeared. Hair has noticeably gotten softer throughout household. Using HDC-treated water has made a major impact on the lawn looking fuller.

Our aloe plant has come back to life and can once again be used for natural remedies. Having the HDC system installed in our home has definitely been a blessing, and would recommend this to everyone who wants to experience water without heavy leads and chemicals!



Lawn filling in after using HDC-treated water

Aloe plant brought back to life

If you would like to speak to any of the authors from the testimonials, they have volunteered to talk with you. Please call Keith who is located in Hawaii at 808-222-7376 to schedule a telephone call.

I cannot believe how good this system is! Last night, the water pressure was low and I was planning on changing the filter, but I waited. I thought the filter I was waiting to replace on the outlet side was causing the problem; turns out the filter that I had changed 10-14 days earlier was completly black and stopped all water pressure in the house overnight! Within minutes of installing the HDC device, all was back to normal and realized the problem that was avoided by not ingesting these toxins! I cannot tell you how happy we are to know how to remove these chemicals!!!


Boston, MA

I wanted to take a minute and reach out to you and let you know how happy I am with your product. I installed this product on my built-in swimming pool last summer and I could not be happier with the results I obtained! I live in Massachusetts and only get to use my pool for a few months a year so keeping it clean is of paramount importance and it most certainly does that and more. When I opened the pool this May I was amazed how clear the water was and the lack of algae on the walls and bottom. Being that the cover was on from the end of September to the middle of May I was expecting to have to Shock and scrub the pool to get rid of the algae and cloudiness in the water that occurs over the winter every year. This year was quite different as I was able to get everything in pristine condition without the usual chlorine and shock treatments that are required after the long winter. Regardless of the chemicals I used and money I spent, the water had never been so clear and clean as it is today simply by installing this product. In addition to being clean and clear after the long winter the chemical usage for maintenance has been reduced to almost nothing. Having two teenage kids the pool gets used quite a bit and Hydrodynamic Cavitation has lived up to its billing and more! My kids are constantly commenting on the improvement in water clarity and lack of chemical smell. For teenagers to notice something like that speaks to the value of this product. It is super easy to install, requires no maintenance, reduces my chemical cost and usage, and reduces my maintenance time which allows me to spend more time enjoying the pool rather than working on it. Thank you for developing such an amazing and useful product.


Eric Langis

Keith offered me to be a part of his sales team. I was in a good position at that time to decide whether I should stay with the current company I was working for, Mr. Water Pro, or hop in with Keith and sell the HDC products.

I said I was going to make my decision after I have tested the water myself. I really just wanted to check out his house in Kahala and then test his chlorine-free swimming pool and hot tub.

This is how it went:

I said, “hey Keith where do I rinse before I get in the pool?” He said, “No need, but if you insist, it’s around the corner, we don’t use it that much.”

Now mind you, I have very sensitive skin and I am very conscious of it. I’m a double wash before I get in any pool, and double rinse off afterwards kind of guy. A little amount of chlorine and my skin feels it then flares up automatically. I took a chance because they did not have any chemicals in it, sure? I dove in with doubtful intentions.

I stayed under water like I was a boy again because my skin did not complain, and my blurry middle aged vision saw underwater with clarity. The water did not sting my eyes at all. I stayed in that water for a long time and the thoughts that came to mind was when I was teaching my kids how to swim. We all have our own skin issues, but the joy of being in the water in the hot summer months in Hawaii is heaven for us local folks.

I made my decision, and so I headed over to Keith and I said, ”You know what you just did?” He said,”what?” “Every kid in Waikiki, excited to finally swim in the ocean, will first, swim at the hotel they’re staying at for practice, right?” I explained the effects of the water on my sensitive skin. It felt awesome. Keith’s chlorine free swimming pool is so inviting. Then I had to test the hot tub’s water. The bubbles came and disappeared because the water was pure. My skin was loving it.

The water was silky and I felt great afterwards. So great, I forgot to take my two shower rinse off after swimming? It didn’t dawn on me until that night when I took a shower at my house that was not equipped with the HDC product. Then, my skin started itching all over again.

Now, I am one of the biggest supporters of this natural phenomenon. Our company learns something new everyday. The benefits are countless. Don’t take our word for it, experience it for yourself and create your own conclusions in regards to what it did for you. Thank you for reading this far.


Ray Seapno


Thanks for contacting me and sharing the July 2020 test report from IAPMO about their 3rd party independent testing of your pool water treatment device.

I understand they tested your 2”x4”x2” pool system hydro-cavitation device under laboratory controlled conditions of water chemistry, temperature, and other factors in accordance with the new Water Conditioning Device requirements found within NSF/ANSI Standard 50-2019. 

These new requirements were created in order to create a controlled and scientific testing program to validate system performance.  The testing criteria requires operating the simulated testing pool in a control mode and test mode so that data is collected on the system both without and then later with the device included.  The testing system uses at 10,000 gallon simulated pool operating at 28gpm (to simulate the traditional 6-hour public pool volumetric turn over) with pump, filter, water intake, water return, heater, chemical feeding, and datalogging equipment similar to a typical pool.  During the system control and test mode operations all inputs such as chemicals like acid, disinfectants, etc. as well as the simulated bather contaminant load dosing etc. are data logged and reported. This makes for a very robust testing regimen that eliminates the uncontrollability and variability of exposed outdoor pools with variable human user inputs. 

I was impressed with the testing results because I have never previously seen a device yield such results.  The product requires no electricity, chemical addition, or other energy inputs and has an extremely low pressure loss (ie pumping loss or head loss) therefore the product has very low operational cost.  But the fascinating part was the operational benefit in terms of time and chemical savings.  The IAPMO testing to NSF/ANSI Standard 50 revealed your product allows facility owners to save time and money on chemical addition because your product showed a 41% reduction in the amount of chlorine that was needed to maintain the pool water chemistry.  Another surprising factor was that your product had such very low resistance to water flow or head loss resistance. When I read the testing results about the reduction in required chlorine to maintain the water chemistry set-points I was really impressed that the product had such low head loss.  I would have expected there to be some pumping losses or downside to the product use, but none are evident from the data.

That type of positive impact and time/money savings is unheard of.  But your product design and use is quite a novel, I have not previously seen such corroborated 3rd party testing data, showing the benefit in pool, spa, waterpark type water treatment applications.  

Your HDC Products, hydro-cavitation devices are fascinating new product technology that deliver results one would not expect. 


Richard A. Martin
President, RAM Consulting

If you would like to speak to any of the authors from the testimonials, they have volunteered to talk with you. Please call Keith who is located in Hawaii at 808-222-7376 to schedule a telephone call.

I recently acquired a HDC water conditioning system after complaining to a friend regarding our water from a 700ft. well system here in Maine.

We were having recent iron problems and our daughters acne was worse than ever. We had the system installed and immediately noticed a difference in our skin and in her acne. We have since sold our home and are temporarily displaced to my mothers home until we build a new house. We are having an HDC system installed in her home and will be putting one in our new house. In the meantime, the new owners have graciously allowed us to go fill up numerous containers of the wonderful cavitated water to drink and use for now. The new owners of our old home also love the system because one family member is immunocompromised and she feels this water is keeping her healthy. Thank you HDC for introducing us to this life changing water system. We won’t live without it no matter where we move to.


Michelle and Mark Houk

We have had a water purification system from KD Enterprises installed in our home. We are happy to say that with this new system our skin and hair feels softer, our plants seem to be happier and there is less hard water deposits on my shower deposits and car. Usually we were cleaning our fish pond once every week. Now with this new system, we now can have three weeks pass before having to clean the filters!  Totally satisfied.


Mark Elwell


My family currently purchased a HDC device for our pool and the results were astonishing unbelievable. I had certain concerns but after your HDC POOL UNIT, I put all my concerns to bed after I was proven with proof of concept from your device. Our pool is UNBELIEVABLY clean and UNBELIEVABLY clear. Our family and friends could not believe how our skin and bodies felt after getting out of my pool. It’s like we was cleaner after getting out than before we got in. I use to add about a 1.5 water a week due to evaporation and upon installing your product, that has decreased to every two weeks or so. I usually don’t leave a testimonial to anything but after seeing all the great benefits from your device, no chlorine, no chlorine smell, almost ZERO chemicals, crystal clear water and happy wife equals happy life I couldn’t refrain from leaving a testimonial. I will certainly pass this to all my friends here on island as well as the mainland. Thanks for improving the health of my wife and I as well as our friends. 

Beau Miller


I recently experienced the wonderful effects of the HDC Pool Unit as well as their Home Unit. I just want to say that the swim I had was beyond anything I’ve experienced. The chlorine smell that I’ve been used to for so many years was completely non-existent, as well as coming out of the pool my hair felt softer and if I did open my eyes in the pool it would not burn. Having the lack of these chemicals in the pool made me feel healthier than I would in a normal chlorine pool. It also amazed me how clear and lack of algae the pool had without any chemicals. This product is amazing. 

With feeling the effects of the Pool Unit, the Home Unit was another product that amazed me. Showering before I noticed that my skin would be extremely dry as well as my hair. Using the Home Unit for a couple weeks, I really noticed the difference in my skin and hair. My hair and skin felt tremendously softer. I also notice that the water spots, soap scum on the walls and glass doors were non-existent. Not to mention the water that comes out of the faucet tastes amazing from what I was used to before! No chemicals or chlorine taste, just water!
I highly recommend this anyone and everyone for their Home and or Pool!



Keanu S.
Kahala, HI


We recently installed an HDC pool unit device at our residence.  For years, my husband complained of skin irritation specifically on his back every time after swimming in our pool or any pool with chlorine in it.  This was an extremely uncomfortable experience for him which kept him out of the pool at times, especially the pool at the gym which seems to be loaded with chemicals.  24hrs after installing the pool device my husband went for a swim.  After exiting the crystal-clear restructured water my husband had no symptoms of any skin irritation.  He commented that his hair felt silky smooth and that he felt no need to rinse off under the outdoor shower.

We no longer use chlorine, and our water evaporation rate has decreased significantly.  We never really stop to realize that every time we backwashed our pool filter, we were doing harm to the environment.  Now that our water is clean and chemical free, we’ve hooked a hose up to the backwash line and use it to water our lawn.  Our quality of swim is the best part of this experience however, knowing that we’re helping the environment is a pretty good feeling too.  We’d recommend to anyone with a swimming pool to consider installing one of HDC’s pool devices, you won’t regret it!



Honolulu, HI


If you would like to speak to any of the authors from the testimonials, they have volunteered to talk with you. Please call Keith who is located in Hawaii at 808-222-7376 to schedule a telephone call.

There is a difference when taking a shower, the water is drinkable, and NO visible water spots on my sinks and faucet due to the calcium build up. We love the system!

Mililani, HI


Message Us

Get in touch below to schedule an HDC device installation. 


HDC Products