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HQUA-OWS-6 Ultraviolet Water Purifier Sterilizer Filter for Kitchen Water Purification,6GPM 110V 25W Model HQUA-UV-6GPM + 1 Extra UV Tube

4.3 4.3 out of 5 stars 283 ratings
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Amazon's Choice in Under-Sink & Countertop Filtration by HQUA

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6GPM

Purchase options and add-ons

Material
Stainless Steel, Plastic
Capacity
6 Liters
Included Components
Bulb
Purification Method
Ultraviolet

About this item

  • 25W 6GPM unit, 22.5*2.5 in stainless steel chamber, 1/2” (DH15, OD 0.840 inch, 21.34cm) MNPT inlet/outlet.
  • Easy installation, No plumber needed. Horizontal installation and metal connector for the inlet/outlet is recommended.
  • NO CHLORINE, Chemical Free and Environmentally Friendly. No change at taste, color, odor, PH.
  • Safety and Reliable, 304 stainless steel and Quartz glass are proved to be reliable in different temperature, pressure, pH. And the only materials that will contact with your water.
  • Missing or Broken parts means DOUBLE Replacements from us.Contact us if you need help.

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 22.8 x 2.5 x 2.5 inches; 4.85 Pounds
  • Item model number ‏ : ‎ HQUA-OWS-6
  • Date First Available ‏ : ‎ December 29, 2016
  • Manufacturer ‏ : ‎ HQUA
  • ASIN ‏ : ‎ B01NCQUE0X
  • Customer Reviews:
    4.3 4.3 out of 5 stars 283 ratings

Important information

To report an issue with this product or seller, click here.


Product Description

How it works?

How UV water sterilizer purifier filter works kill the bacteria and microbe.

The ultraviolet (UV) treatment process is an extremely quick physical process. Ultraviolet light mutates and/or degrades DNA. When the DNA is damaged, the organism becomes unable to function because its “instructions” are garbled or missing. An organism that has no instructions cannot function and reproduce, and cannot cause infection. It is rendered harmless and eventually dies.

In the UV disinfection process, water is purified as it runs through a stainless steel chamber (also called a “reactor”) that contains a special UV- producing lamp. As the water flows past the lamp, the microbe in the water receive a lethal dose of UV.

HQUA UV Water Purifier is a water treatment device that needs to be assembled, but it’s easy to finish. Each part of it have its own function, we will introduce them hereby:

Main Components Of The HQUA UV Water Sterilizer.

UV reactor chamber of UV water sterilizer filter purifier

UV bulb lamp quartz sleeve 12GPM 55w

HQUA-OWS-455EB

UV Reactor Chamber

Part Number: OWS-6C

The UV chamber is made by 304 stainless steel, which was widely used in food industry, medical, considered to be stable and durable.

Length-22.8 inch, diameter-2.5 inch, inlet/outlet 1/2”, no requirement of the water flow direction.

UV lamp & Quartz sleeve

Quartz sleeve (Part Number: HQUA-OWS-6Q) not only provide an interspace for the UV lamp, but also ensure high transmittance (90%) for the UV light.

UV lamp (Part Number: HQUA-OWS-6L, GPH565T5L standard 4-pin) provide enough UV light to destroy the DHA of the microbe and bacteria.

Electronic Ballast

Electronic ballast (Part Number: HQUA-OWS-455EB) connect the UV lamp and the power (120V/60Hz), work as a controller in the system with 3.2 ft. (100cm) power cord and 3ft. (90cm) lamp cord.

Green light on ‘work’ means everything alright, red light blinks on ‘fault’ and the controller beeps when the system is failed.

safe sterilization treatment.

Go Green and Satey

Green and safe sterilization treatment. Lack of chemicals means no harmful chemical byproducts are going back into the nature. And it avoid the potential threat residual chlorine, the taste of your water is not affected in any way as well.

4 log 99.99% reducing bateria microbe sterilization

Effective Sterilization

HQUA water sterilizer ensure a 99.99% reducing of bacteria and microbe in the water. The corresponding UV exposure is 30 mJ/cm². A slower flow rate, a higher wattage device or two sterilizer might be effective to handle a strong bacteria and microbe problem.

Installation and Maintenance

Installation and Maintenance

Easy installation and maintenance. No need for chemical supplement, the equipment is intended to be installed in the pipe system permanently. the lamp needs to be replaced annually and the quartz sleeve should be cleaned every 6-12 months, replace every 2 years.

UV water sterilizer instruction manual booklet

Complete Technical Description

Please CHECK YOUR BOOKLET in the package before you handle this system. We have a complete instruction manual that contains many detailed description of the unit that will help you a lot.

NOTICE:

Pre-treatment:

Water quality is extremely important for the optimum performance of your UV system. The following levels are recommended :

  • Iron < 0.3 ppm (0.3 mg/L)
  • Hardness< 7 gpg (120 mg/L)
  • Turbidity < 1 NTU
  • Manganese < 0.05 ppm (0.05 mg/L)
  • Tannins < 0.1 ppm (0.1 mg/L)
  • UV Transmittance> 75%

Hot Water Warning

The water in the chamber of this equipment can be very hot (Approx. 140 °F) during an extended periods of no water flowing. It would not be a problem if the pipe system is long enough to disperse the heat.

But if it happens,it is recommended to purchase a temperature control valve if this is an annoying problem for you.

If you need a system for HQUA-OWS-6, please search “B09QKP6NB8” or “HQUA WS-DV02” on Amazon.

Maintenance

  • UV lamp: Replace the UV lamp annually (or biennially if seasonal home use) to ensure maximum disinfection.
  • Quartz Sleeve: Clean the quartz sleeve every 6-12 months, replace every 24 months. The coating on the quartz sleeve will slowly form due to the minerals in the water. This coating must be removed because it reduces the amount of UV light reaching the water, thereby reducing disinfection performance. If the sleeve can not be cleaned, it must be replaced.
  • Please search "B06XG19Q2Y""B07HQMWG1Y" for the replacement quartz sleeve and "B07NXWM9T5" "B07HQKKZ9Y" for the UV bulb.

HQUA-OWS-12 HQUA-OWS-6 HQUA-TWS-12 HQUA-OWS-12T HQUA-OWS-124
HQUA-OWS-12 12GPM 40W Whole House UV Water Purification System HQUA-OWS-6 6GM 25W Kitchen Undersink UV Water Purification System HQUA-TWS-12 12GPM 55W Whole House UV Water Purification System HQUA-OWS-12T 12GPM 40W Whole House UV Water Purification System HQUA-OWS-124 12GPM 40W Whole House UV Water Purification System
Customer Reviews
4.4 out of 5 stars
919
4.3 out of 5 stars
283
4.6 out of 5 stars
352
4.5 out of 5 stars
92
4.1 out of 5 stars
124
Vertical/Horizontal Installation
Flow Rate 12GPM 6GPM 12GPM 12GPM 12GPM
Wattage 40W 25W 55W 40W 40W
UV bulb Quantity/Part Number/ASIN 2/HQUA-OWS-12L/B07NXX83KM,B07HQ781CK 2/HQUA-OWS-6L/B07NXWM9T5,B07HQKKZ9Y 2/HQUA-TWS-12L/B07JF2CGWB,B07ZFDBKPB 3/HQUA-OWS-12L/B07NXX83KM,B07HQ781CK 3/HQUA-OWS-12L/B07NXX83KM,B07HQ781CK
Quartz Sleeve Quantity/Part Number/ASIN 1/HQUA-OWS-12Q/B06XFX6Y4S,B07HQGW9XQ 1/HQUA-OWS-6Q/B06XG19Q2Y,B07HQMWG1Y 2/HQUA-TWS-12Q/B07JDRB6LH,B07ZFBPGQW 1/HQUA-OWS-12Q/B06XFX6Y4S,B07HQGW9XQ 2/HQUA-OWS-12Q/B06XFX6Y4S,B07HQGW9XQ
Electronic Ballast HQUA-OWS-455EB/B071JXXFHK HQUA-OWS-455EB/B071JXXFHK HQUA-TWS-5595EB/B07JFGBQ1D HQUA-EBS51-425-40L/B0714HSSNH HQUA-OWS-455EB/B071JXXFHK
O-ring B07Q5R3JHP B07Q5R3JHP B07Q5R3JHP B07Q5R3JHP B07Q5R3JHP
Count-down Timer

What's in the box

  • Bulb
  • Looking for specific info?

    Customer reviews

    4.3 out of 5 stars
    4.3 out of 5
    283 global ratings

    Customers say

    Customers like the performance, value, and ease of installation of the water purification unit. For example, they mention that it works well, the instructions are clear, and it's affordable for that level of protection. That said, some complain about leakage and power supply.

    AI-generated from the text of customer reviews

    35 customers mention35 positive0 negative

    Customers find the installation process of the water purification unit to be easy. They appreciate the clear instructions and the fact that all the parts are included. Some mention that the installation does not leak.

    "exactly what I needed. easy installation also" Read more

    "Liked this uv light. Light was made of good material. Instructions for insulation were clear and all the parts were included...." Read more

    "I installed this 25W UV sterilizer in my house. Directions were clear enough. No leaks. All parts were there...." Read more

    "Installed and working properly. Great price as my original very expensive too change the power unit and bulbs...." Read more

    32 customers mention26 positive6 negative

    Customers like the performance of the water purifier. They mention that it works well, the UV light works well and that it is excellent.

    "...Installation went well unit seems to be performing well. This unit could be much smaller and lower wattage if your own handling the kitchen water...." Read more

    "works great" Read more

    "Installed and working properly. Great price as my original very expensive too change the power unit and bulbs...." Read more

    "...Once we installed the sleeve the leaking stopped. And the product works great!!! Very very great customer service!..." Read more

    32 customers mention25 positive7 negative

    Customers like the quality of the water purification unit. They say that it is easy to install, the hardware is solid, and the fit and finish of the components is awesome. Some say that the unit came intact and ready to install.

    "Liked this uv light. Light was made of good material. Instructions for insulation were clear and all the parts were included...." Read more

    "...When I first saw the unit, I was immediately struck by the high quality of the welding on the stainless steel cylinder...." Read more

    "...Otherwise well made and as good as my much more expensive system" Read more

    "...Obviously we will continue to use their products. They are durable, dependable, and affordable for that level of protection...." Read more

    15 customers mention15 positive0 negative

    Customers appreciate the value of the water purification unit. They mention that it's an inexpensive fix to a complex issue and affordable for that level of protection.

    "...I chose this particular equipment then, not only because of its excellent price, but also because the seller was obviously serious about the..." Read more

    "...It works perfectly.Overall, a very good value." Read more

    "Installed and working properly. Great price as my original very expensive too change the power unit and bulbs...." Read more

    "...They are durable, dependable, and affordable for that level of protection...." Read more

    6 customers mention6 positive0 negative

    Customers are satisfied with the cleanliness of the water purification unit. They mention that the water is crystal clear, and the whole house water is now drinkable.

    "A little finicky setting up, but is a great addition to our water purification system in our tiny cabin" Read more

    "Works perfectly now for more than 3 months....whole house water is now drinkable (I live in Guyana) and it's great not to have to run to filtered..." Read more

    "...We now have crystal clear water and no more iron bacteria slime in our toilet tanks." Read more

    "I like it because it's doing it's job. Keeping the water purified...." Read more

    14 customers mention3 positive11 negative

    Customers are dissatisfied with the water purification unit's ability to leak. They mention that the plastic degrades and causes a leak, and the slightest pin hole creates a steady drip.

    "...of the ultraviolet rays, it will eventually degrade the plastic and cause a leak...." Read more

    "When we first installed this it leaked. We contacted customer support and they explained we needed to out the quartz sleeve in...." Read more

    "...with a small crack in the quartz tube and there was a tiny leak that got inside the tube, wetting the bulb...." Read more

    "...Directions were clear enough. No leaks. All parts were there...." Read more

    7 customers mention0 positive7 negative

    Customers are dissatisfied with the power supply of the water purification unit. They mention that the electronics sometimes fail, the transformer failed just shy of 2 years, and the bulb only lasted 80 days or less. The product has a high failure rate and is not recommended for long-term use.

    "...It is true, electronics sometimes fail. That is why I thought it was a good idea to obtain a spare ballast with my original purchase...." Read more

    "...After a week it stopped working but I found the bulb had fallen in the quartz tube and disconnected...." Read more

    "Bulb only lasted 80 days or less , don’t check it every day , replaced with second bulb , will see how long it last !" Read more

    "...The transformer failed just shy of 2 years but was able to replace it so not a huge problem." Read more

    High Quality Hardware and Excellent Long-term Support
    5 Stars
    High Quality Hardware and Excellent Long-term Support
    This is a long-term review of this product and the associated accessories and service from the seller. My application is unusual, so I am also illustrating another example of the applicability of this equipment to special purposes.I purchased two different bundles of this product in 2018, and I have made two additional purchases of accessories in the ensuing years. I have always found this seller to be very responsive to questions and concerns, and this is true even today. Several recent reviews criticize the seller for not making replacement UV lamps available. I recently asked the seller (using Amazon's "contact the seller" function) about this, and was directed to currently available listings for replacement lamps. It turns out that these same listings can be uncovered simply by searching on Amazon for "HQUA". The seller stated that Amazon has blocked them from updating their product listing to change the product ID for the spare lamps!My application for this equipment is unusual, but hearing about my experiences should be helpful to all. I installed the OWS-6 unit into an evaporative cooler that is located on the roof of my house. (See photo.)As background, after several years of normal operation of that cooler, it developed a severe infestation of black mold, and simply cleaning and disinfecting the cooler was not effective in getting rid of it. I desperately needed to eliminate that mold to protect my family, and I decided that continuous sterilizing of the water in the cooler with ultraviolet radiation would probably do the job. However, IF that scheme did NOT work, I did not later want to be in the position of wondering whether using a larger sterilizing unit would have worked instead, so I decided to use the largest unit that I could reasonably physically fit into the cooler. This turned out to be the OWS-6. This is probably severe overkill for this application, but it certainly worked, and I am very happy about that!In subsequent years, neighbors have complained about getting algae growth in their coolers. I haven't had that problem! It is really a pleasure to see the amazingly clean water in the cooler at the end of the season, compared to what it looked like before I installed the UV sterilizer (even before the mold problem appeared).My first purchase was in February 2018. I chose this particular equipment then, not only because of its excellent price, but also because the seller was obviously serious about the continued support of customers. I say that because my original purchase was a bundle (no longer offered) that consisted of the stainless steel housing, 3 lamps, 2 Quartz tubes, and 2 ballasts. Clearly the seller was aware of the practical need for spare parts! The seller also guaranteed that if any parts were missing or broken, double that amount of replacement parts would be shipped quickly, at no charge. They still say that, as it turns out.When I first saw the unit, I was immediately struck by the high quality of the welding on the stainless steel cylinder. I also noted that the “HQUA" label applied to the cylinder was crooked, which just served to confirm to me that the manufacturer was emphasizing the correct things, in my view!One of the important aspects of my system that you can see in the photo is the use of two short brass street elbows at each of the water connections on the cooler. I didn't want to use long runs of metal tubing inside the cooler, and I figured that if the UV radiation from the lamp was subjected to at least two successive 90 degree reflections from brass surfaces, that the residual radiation would be small enough so that there would be no deterioration of the standard vinyl tubing used inside the cooler. That estimate turned out to be correct.Note that questions about the minimum operating pressure of the system are completely put to rest by the successful operation of this system. The system operates at essentially zero pressure; a small pump sends water from a reservoir through the sterilizing tube and then to the top of evaporative media pads, where it falls through the pads and (the portion that has not evaporated) back into the reservoir. An inlet valve and float system keeps the reservoir filled. The double street elbows mentioned above did restrict the water flow a bit, but I solved that simply by moving up to the next larger standard size cooler pump.Also, questions about intermittent operation of the system have also been resolved. The UV lamp is controlled so that it operates only when there is water flow in the system. The cooler is turned on and off at least once per day (if used at all) during the cooling season. As I stated in the answer to one of the questions about the product, in the first 3 seasons, the lamp was started 533 times and the total hours of operation were 4070. The lamp seemed to be still going strong at that point, but I decided to retire it, at least temporarily.It seems like most of the negative reviews are related to leaks and the breaking of the quartz tube that surrounds the UV lamp. To me, these problems are closely related to the large number of questions about the use of pipe dope and/or teflon tape on the screw threads of the ends of the lamp housing. My product manual from 2018 says to “use teflon tape if you need it”. Well, the very important fact is, YOU DON'T NEED IT (and you shouldn't use it!). The writer of the manual was obviously trying to be helpful, but I don't think it worked out well.The thinking that you need to seal the threads at the ends of the housing demonstrates a fundamental misunderstanding of how the system is meant to work. The silicone O-Rings that surround the quartz tubing and that are compressed between the threaded ends of the housing and the end caps are fully capable of and are intended to seal the water into the housing. As such, these are very important parts of the system, and they need to be installed correctly. If you are getting a leak there, that leak needs to be fixed and not covered up by using tape on the threads of the cap.The silicone O-Rings will not leak if they are clean and if they are correctly installed on to a clean quartz tube and clean stainless steel housing and clean end caps. They do not need to be tightened very much before sealing either. Because these O-Rings have an inner diameter that is actually a cylindrical surface, it is difficult to slide them along the quartz tube. But that is exactly what needs to be done: using gloved hands, carefully work the O-Rings to the correct positions along the tube. Don't think that the rings can be slid large distances by cranking down on the threads -- that is a recipe for breaking the quartz tube.Here is what Scrubjay said in his 5 star review of June 21, 2018, which bears repeating here:“Installation tip: the O-rings do not have a round cross section, but rather are beveled. They have a tendency to roll when sliding them onto the quartz tube,so may end up twisted. Inspect the O-rings carefully to make sure they are seated properly against the beveled opening in the housing and not twisted before screwing on the end caps. Don't assume everything will line up properly when you screw the end caps on.”Also, don't think that these rings can be replaced by conventional O-Rings from the hardware store -- those will deteriorate quickly in the UV radiation from the lamp. While these silicone O-Rings are much more resistant to the UV radiation, they are not completely immune from it. Thus, after a long period of operation, they tend to get stuck to the quartz tube. If that occurs, it is easy enough to carefully slice them off with a razor blade, and then you can clean the quartz tube and evaluate if you want to reuse or replace it.The bottom line is that it is extremely important that these O-Rings be made readily available by the seller, so that customers can continue to service their systems. The seller used to offer a set of 6 rings as product ID B07Q5R3JHP, but while the listing still exists, it says that the set is no longer available. When I contacted the seller recently about this I was told that they could be supplied in 1 week (I'm not sure exactly how), but I was also told that 4 O-rings are supplied with each spare quartz tube, and that the seller considers this to be an adequate number of spare O-rings. We might disagree a bit about the O-rings, but the seller continues to be responsive to customer concerns. Perhaps if several customers ask about purchasing O-rings, they will bring back that or a similar product listing.Some negative reviews complain about the ballast failing. It is true, electronics sometimes fail. That is why I thought it was a good idea to obtain a spare ballast with my original purchase. However, those failures are often random, and I happen to be still using the first ballast that I installed in the cooler.
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    Reviewed in the United States on December 15, 2023
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    Reviewed in the United States on November 6, 2023
    Reviewed in the United States on May 17, 2022
    Customer image
    5.0 out of 5 stars High Quality Hardware and Excellent Long-term Support
    Reviewed in the United States on May 17, 2022
    This is a long-term review of this product and the associated accessories and service from the seller. My application is unusual, so I am also illustrating another example of the applicability of this equipment to special purposes.

    I purchased two different bundles of this product in 2018, and I have made two additional purchases of accessories in the ensuing years. I have always found this seller to be very responsive to questions and concerns, and this is true even today. Several recent reviews criticize the seller for not making replacement UV lamps available. I recently asked the seller (using Amazon's "contact the seller" function) about this, and was directed to currently available listings for replacement lamps. It turns out that these same listings can be uncovered simply by searching on Amazon for "HQUA". The seller stated that Amazon has blocked them from updating their product listing to change the product ID for the spare lamps!

    My application for this equipment is unusual, but hearing about my experiences should be helpful to all. I installed the OWS-6 unit into an evaporative cooler that is located on the roof of my house. (See photo.)

    As background, after several years of normal operation of that cooler, it developed a severe infestation of black mold, and simply cleaning and disinfecting the cooler was not effective in getting rid of it. I desperately needed to eliminate that mold to protect my family, and I decided that continuous sterilizing of the water in the cooler with ultraviolet radiation would probably do the job. However, IF that scheme did NOT work, I did not later want to be in the position of wondering whether using a larger sterilizing unit would have worked instead, so I decided to use the largest unit that I could reasonably physically fit into the cooler. This turned out to be the OWS-6. This is probably severe overkill for this application, but it certainly worked, and I am very happy about that!

    In subsequent years, neighbors have complained about getting algae growth in their coolers. I haven't had that problem! It is really a pleasure to see the amazingly clean water in the cooler at the end of the season, compared to what it looked like before I installed the UV sterilizer (even before the mold problem appeared).

    My first purchase was in February 2018. I chose this particular equipment then, not only because of its excellent price, but also because the seller was obviously serious about the continued support of customers. I say that because my original purchase was a bundle (no longer offered) that consisted of the stainless steel housing, 3 lamps, 2 Quartz tubes, and 2 ballasts. Clearly the seller was aware of the practical need for spare parts! The seller also guaranteed that if any parts were missing or broken, double that amount of replacement parts would be shipped quickly, at no charge. They still say that, as it turns out.

    When I first saw the unit, I was immediately struck by the high quality of the welding on the stainless steel cylinder. I also noted that the “HQUA" label applied to the cylinder was crooked, which just served to confirm to me that the manufacturer was emphasizing the correct things, in my view!

    One of the important aspects of my system that you can see in the photo is the use of two short brass street elbows at each of the water connections on the cooler. I didn't want to use long runs of metal tubing inside the cooler, and I figured that if the UV radiation from the lamp was subjected to at least two successive 90 degree reflections from brass surfaces, that the residual radiation would be small enough so that there would be no deterioration of the standard vinyl tubing used inside the cooler. That estimate turned out to be correct.

    Note that questions about the minimum operating pressure of the system are completely put to rest by the successful operation of this system. The system operates at essentially zero pressure; a small pump sends water from a reservoir through the sterilizing tube and then to the top of evaporative media pads, where it falls through the pads and (the portion that has not evaporated) back into the reservoir. An inlet valve and float system keeps the reservoir filled. The double street elbows mentioned above did restrict the water flow a bit, but I solved that simply by moving up to the next larger standard size cooler pump.

    Also, questions about intermittent operation of the system have also been resolved. The UV lamp is controlled so that it operates only when there is water flow in the system. The cooler is turned on and off at least once per day (if used at all) during the cooling season. As I stated in the answer to one of the questions about the product, in the first 3 seasons, the lamp was started 533 times and the total hours of operation were 4070. The lamp seemed to be still going strong at that point, but I decided to retire it, at least temporarily.

    It seems like most of the negative reviews are related to leaks and the breaking of the quartz tube that surrounds the UV lamp. To me, these problems are closely related to the large number of questions about the use of pipe dope and/or teflon tape on the screw threads of the ends of the lamp housing. My product manual from 2018 says to “use teflon tape if you need it”. Well, the very important fact is, YOU DON'T NEED IT (and you shouldn't use it!). The writer of the manual was obviously trying to be helpful, but I don't think it worked out well.

    The thinking that you need to seal the threads at the ends of the housing demonstrates a fundamental misunderstanding of how the system is meant to work. The silicone O-Rings that surround the quartz tubing and that are compressed between the threaded ends of the housing and the end caps are fully capable of and are intended to seal the water into the housing. As such, these are very important parts of the system, and they need to be installed correctly. If you are getting a leak there, that leak needs to be fixed and not covered up by using tape on the threads of the cap.

    The silicone O-Rings will not leak if they are clean and if they are correctly installed on to a clean quartz tube and clean stainless steel housing and clean end caps. They do not need to be tightened very much before sealing either. Because these O-Rings have an inner diameter that is actually a cylindrical surface, it is difficult to slide them along the quartz tube. But that is exactly what needs to be done: using gloved hands, carefully work the O-Rings to the correct positions along the tube. Don't think that the rings can be slid large distances by cranking down on the threads -- that is a recipe for breaking the quartz tube.

    Here is what Scrubjay said in his 5 star review of June 21, 2018, which bears repeating here:

    “Installation tip: the O-rings do not have a round cross section, but rather are beveled. They have a tendency to roll when sliding them onto the quartz tube,so may end up twisted. Inspect the O-rings carefully to make sure they are seated properly against the beveled opening in the housing and not twisted before screwing on the end caps. Don't assume everything will line up properly when you screw the end caps on.”

    Also, don't think that these rings can be replaced by conventional O-Rings from the hardware store -- those will deteriorate quickly in the UV radiation from the lamp. While these silicone O-Rings are much more resistant to the UV radiation, they are not completely immune from it. Thus, after a long period of operation, they tend to get stuck to the quartz tube. If that occurs, it is easy enough to carefully slice them off with a razor blade, and then you can clean the quartz tube and evaluate if you want to reuse or replace it.

    The bottom line is that it is extremely important that these O-Rings be made readily available by the seller, so that customers can continue to service their systems. The seller used to offer a set of 6 rings as product ID B07Q5R3JHP, but while the listing still exists, it says that the set is no longer available. When I contacted the seller recently about this I was told that they could be supplied in 1 week (I'm not sure exactly how), but I was also told that 4 O-rings are supplied with each spare quartz tube, and that the seller considers this to be an adequate number of spare O-rings. We might disagree a bit about the O-rings, but the seller continues to be responsive to customer concerns. Perhaps if several customers ask about purchasing O-rings, they will bring back that or a similar product listing.

    Some negative reviews complain about the ballast failing. It is true, electronics sometimes fail. That is why I thought it was a good idea to obtain a spare ballast with my original purchase. However, those failures are often random, and I happen to be still using the first ballast that I installed in the cooler.
    Images in this review
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    9 people found this helpful
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    Reviewed in the United States on January 17, 2024
    Reviewed in the United States on October 7, 2018
    Customer image
    5.0 out of 5 stars Excellent.
    Reviewed in the United States on October 7, 2018
    I installed this 25W UV sterilizer in my house. Directions were clear enough. No leaks. All parts were there. Customer service was excellent (I thought I was missing O rings and they sent some out immediately; I later found the missing O rings). As described by the seller, if the UV system is left on for extended periods of time with no water flowing, it can get warm. Mounting to a plywood board makes install easy.

    I wanted to save energy, so I used a timer to shut the unit down late at night and I also used a cheap temperature controller (WILLHI WH1436A) to turn power off to the unit when no water was being used during the day and the unit started to heat up. By placing the temperature sensor at the inlet of the UV canister, the temperature drop of the cold incoming water turns the UV back on instantly when I do use water. It works perfectly.

    Overall, a very good value.
    Images in this review
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    78 people found this helpful
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    Reviewed in the United States on November 3, 2023