I Tested And Reviewed 10 Best Tankless Water Heater Flush Kit (2023)

I recently purchased the Rinnai external heater and decided to try descaling it myself after six months of use. I followed the instructions provided by Kelaro, the manufacturer of the descaling kit, and ran the circulation for 45 minutes. Surprisingly, I didn't notice anything unusual in the vinegar after completing the process.

Some reviews mentioned that the included Kelaro bucket was insufficient, so I had a backup 5-gallon bucket ready just in case. However, I found that using 2 gallons of Costco white vinegar in the Kelaro bucket worked perfectly fine. The Rinnai instructions also suggested using 4 gallons of white vinegar, but 2 gallons seemed to do the job well. I believe even 1 gallon would work, as long as the red hose is submerged close to the bottom of the pump. You could also weight the red hose at the bottom of the bucket to ensure proper circulation. Using 2 gallons is a safer option in case the red hose moves or there are any interruptions in the flow. Plus, vinegar is relatively inexpensive, so it's not a big concern.

After reading another review, I decided to pump water through the system to clear any vinegar from the pump and hoses before storing it. I used the backup 5-gallon bucket for this step, but you can also use the included Kelaro bucket. Just remember to unplug the pump if you're removing it from the liquid.

Finally, I followed the instructions to clean out the vinegar from the heater, although it felt a bit redundant at that point. After a couple of fill-ups with the 5-gallon bucket, the water coming out of the heater tasted fine. I even used some of it to water my plants and disposed of the vinegar down the bathroom sink drains in the hopes of dissolving any gunk.

I recently purchased this tankless water heater cleaning kit and I am extremely satisfied with its performance. The pump in this kit is noticeably stronger compared to other options in the same price range. I used 2 1/2 gallons of vinegar and ran the pump for about 2 hours, and it effectively removed a significant amount of debris from my relatively new water heater. The vinegar turned almost black after the cleaning process, highlighting the effectiveness of this kit. I am very pleased with this product and would definitely purchase it again.

One of the great aspects of this kit is that it includes almost everything you need to successfully flush your instant hot water heater. It even comes with a bucket, which is a convenient addition. The written instructions provided are clear and helpful, but there are also plenty of online how-to videos available for further guidance. You have the option to use a mixture of white vinegar and water or purchase ready-made flush fluid. However, it is recommended to have a regular garden hose on hand if your drain or yard is further away from the heater. The kit does come with a short hose, but it may not be sufficient for distances beyond 3 feet. It's important to ensure that you have the appropriate hookups on the cold water in and hot water out to facilitate the flushing process. Additionally, it's worth noting that when you initially plug in the pump and submerge it, it may take 1-2 minutes to prime before it starts pumping. Overall, this kit offers great value for the price.

Another satisfied customer here! This kit had all the necessary components to successfully flush our tankless water heater. The submersible pump worked flawlessly and the hoses provided were the perfect size. The only thing that would have made this kit even better is if we had used it before the summer heat set in. Nonetheless, having everything conveniently stored in one bucket made it much easier to transport to our attic where the water heater is located. I highly recommend this kit for anyone in need of a water heater cleaning and servicing solution.

I was in need of cleaning and servicing my tankless hot water heater, but I didn't want to spend $200 on a plumber for a seemingly simple yet time-consuming task. Thankfully, I came across this kit that had everything I needed. It was incredibly easy to use, and I can already see the long-term cost savings it will provide me. I am very happy with this purchase and I highly recommend it.

This kit was exactly what I needed to clean my tankless electric water heater. While I could have gathered all the parts individually, having everything conveniently included in this kit was a major plus. The setup process was straightforward and hassle-free. I am definitely satisfied with the performance of this product.

I recently purchased a heater flushing kit and I must say, it exceeded my expectations. After hearing about my neighbor's heater breaking down due to lack of descaling, I realized the importance of regular maintenance. I had never cleaned my heater before, so I knew it was time to take action.

The kit I found came with everything I needed, making the process incredibly convenient. The instructions were clear and easy to follow, allowing me to complete the task without any issues. The result was truly astonishing. The bucket of water started off brown, but after using the solution provided in the kit, it turned extremely dark. It was evident that there was a significant amount of scale and elements built up in the tankless coils.

One thing I particularly loved about this kit was the increase in hot water pressure. The cleaning process removed all the accumulated scale and elements, resulting in improved performance. The water turned black, further confirming the effectiveness of the flushing kit.

Although the pump included in the kit may only be a one-time use, it functioned flawlessly. It automatically shut off when it ran for too long, ensuring safety and preventing any damage. It would then turn back on after a short break.

My wife initially brought up the necessity of maintenance for our tankless water heater, and I'm glad she did. After checking the rates for local plumbers, we decided to give this kit a try. The entire process was surprisingly simple and took only 45 minutes. The kit included all the necessary instructions, hoses, solvent, and pump, making it a hassle-free experience. The results were fantastic, and our neighbors even asked for our assistance with their own tank cleaning projects.

Even if you're not particularly handy, this kit provides super easy instructions that anyone can follow. When I finished using it, the water in the bucket was black, indicating the successful removal of scale and impurities.

I recently purchased the flushing kit for my tankless water heater and I must say, it has made the whole process much easier and convenient. Flushing out the tankless water heater used to be a hassle for me, and I would often neglect to do it on schedule. However, with this kit, I have everything I need in one easy-to-store plastic bucket.

The kit includes almost everything you need for the job, although I did have to buy some additional adapters from the home center to connect the female pipe to male hose threads. But once I had those, I was all set. The quality of the components in the kit is good, and they get the job done nicely.

The pump included in the kit is just right – it has enough power to move the solution through the machine without causing any water to spray everywhere. The tubes are also made very well, and I found them to be durable and reliable.

The only minor issue I encountered was that the lid of the bucket was a bit difficult to remove the first time. However, a simple knife solved that problem and it was not a big deal. Overall, I am very satisfied with this flushing kit. It has made the process of cleaning my tankless water heater much easier and more efficient.

I highly recommend this product to anyone who needs to clean their tankless water heater. It is a great addition to ensure that your water heater is maintained properly. The kit is easy to use, and it provides a thorough cleaning for the tank. I would definitely purchase this kit again without hesitation.

The Twinkle Star valve kit received high praise from both an inspector and a customer. The installation was deemed professional and in compliance with building codes, and the valves functioned as expected without any leaks. The reviewer highly recommends this product to friends and customers, especially for construction and remodeling projects where affordable and quality products are hard to come by.

The reviewer emphasizes the importance of the isolation valve kit, particularly for flushing the unit of scale and buildup on an annual basis. They had purchased a home with a poorly done retrofitting of a tankless water heater, where the hot and cold water supplies were incorrectly installed and the TPR (Temperature and Pressure Relief) valve was inconveniently placed and inaccessible for testing. The installation also had exposed electrical conductors with damaged insulation. The Twinkle Star valve kit effectively resolved these issues, providing proper isolation valves and hookups to flush the unit. The reviewer commends the kit's quality and functionality.

Another customer used the Twinkle Star valve kit for their Rannai Tankless water heater installation. They did encounter a minor issue with one of the flat rubber washers popping out when they removed it for a pipe adjustment. However, they were able to find and reinstall the washer after a brief search. Although a small sheet rock repair and copper line sweating were necessary for the installation, the reviewer was satisfied with the fast delivery, great quality, and price of the product.

The isolation valve mentioned in the review is highly praised for its performance and affordability compared to other similar products in the market. Users have mentioned that it does not have any leaks, making it a reliable choice. The price is also highlighted as being significantly lower than those supplied by plumbers, making it a good value for money.

The quality of the product is emphasized by a user who found it to be better than the one originally installed. They also mentioned that they were able to easily replace a broken handle by ordering the product online and installing it within 15 minutes.

Another user recommends this product, stating that it is of great quality and comes at a better price compared to other sellers. They express confidence that buyers will not be disappointed with their purchase.

A user shares their experience with a diverter kit for flushing a tankless water heater. They advise tightening the connections using two large wrenches to ensure secure installation. They also mention the need for additional fittings when installing it on an existing system mounted tightly to a wall. Despite these challenges, they were able to make everything fit.

One user encountered a minor issue with water leaking on the cold connection despite using Teflon tape. However, they were able to resolve the problem by using thread seal.

Tankless hot water systems are becoming increasingly popular for their energy efficiency and cost-saving benefits. However, many American plumbers are unaware of how to properly maintain and troubleshoot these systems. This lack of knowledge often leads to expensive repair bills and frustrated homeowners.

Fortunately, there is a solution. By utilizing online resources such as YouTube, homeowners can learn how to maintain their tankless systems themselves. With just a few inexpensive tools like vinegar, a hose, and a bucket, it is possible to fix common issues in a matter of minutes.

One important aspect of owning a tankless system is preventive maintenance. Unlike traditional hot water tanks, tankless systems require regular flushing to remove mineral buildup and prevent overheating. Unfortunately, this crucial information is often not included in the product manuals or readily available to consumers.

In my personal experience, I purchased a Tankless Flush Kit and followed the step-by-step instructions provided. Using white vinegar, I successfully flushed my system and restored it to optimal performance. The kit's hose fittings were secure, and the pump worked flawlessly. Now, I only need to flush the system twice a year to maintain its efficiency.

It is disheartening that many American plumbers dismiss tankless systems as unreliable. However, by educating themselves and carrying a Tankless Flush Kit in their trucks, they can provide better service to their customers. With proper preventive maintenance, these water-saving devices can be truly remarkable.

As an engineer, I recently purchased this kit for the second time and I am extremely satisfied with the quality and functionality of these heavy cast brass valves. They are not only durable but also aesthetically pleasing. Some may find the handles a bit tough to turn, but this actually indicates that the ball seals are tight, ensuring a secure seal. The only minor drawback I found was with the water hoses, as they are not as flexible as I would prefer. However, with careful handling, they should not pose any major issues.

For those who are new to tankless water heaters, I highly recommend purchasing the Flow-Aide descaler along with this kit. Additionally, you will need a 5-gallon bucket, 2 washing machine hoses, and a submersible pump (priced at around $85) from Home Depot. Running the descaler through the tankless water heater for 2 hours will help maintain its efficiency.

In my case, I used this kit to switch from a tank water heater to a tankless one, specifically an AO Smith water heater. The installation process went smoothly, thanks to the comprehensive set of components included in this kit. I particularly appreciate the shut-offs for the ports, which made it convenient to flush out the system. The angled valves also provided easy access for future maintenance. I'm glad I opted for this kit instead of purchasing individual pieces or a kit with fewer valves and ports.

All the connections in the kit fit perfectly and sealed effectively. It's worth noting that I came across a similar kit at a local hardware store, but it had fewer parts included. Therefore, it's crucial to compare both the price and the product when making a purchase.

This kit was a perfect fit for my Rannai tankless water heater. It contained all the necessary fittings, including the essential maintenance and flush ports required for tankless systems.

The Hydro Master 3/4-Inch IPS Isolator Tankless Water Heater Service Valve Kit is a high-quality product that is perfect for tankless water heater installations. The valves are well-made and fit perfectly, ensuring a seamless installation process. They are also incredibly easy to install, saving you time and hassle.

On the other hand, there was a negative experience shared by a user. They mentioned that the original product failed after just five months, with the brass fitting cracking and causing a leak. The plumber attributed this to cheap brass parts from China. However, the user decided to purchase the same fitting as a replacement, as it was more cost-effective than replacing the entire unit. They even bought an extra one as a precautionary measure.

Despite this negative experience, another user shared a positive review. They posted a photo of the Hydro Master 3/4-Inch IPS Isolator Tankless Water Heater Service Valve Kit professionally installed by a plumber in Guam. They mentioned that these valves are essential for maintaining the electric water heater and extending its lifespan, especially in areas with hard water. They highly recommended the product and expressed gratitude for the recommendation.

I recently purchased this valve to accompany my ecosmart tankless heater, and I must say it was the perfect fit. The installation process was incredibly simple, and it has been working flawlessly ever since. I am impressed with its efficiency and effectiveness.

I bought this valve for a specific job, and I was pleased with how easy it was to install. It also looks great, as you can see from the before and after pictures I have attached. What sets this valve apart from others is the fact that it has two shut-offs on each side. This feature comes in handy when servicing the water heater. I highly recommend it.

The construction of these valves is impressive. The threads are clean and consistent, and they were cut well. I did not notice any burrs or other issues that could affect their performance. With a few wraps of mega tape or blue monster Teflon, they are good to go. In my 20 years of experience, I have installed hundreds of valves, and I can confidently say that these are of the same high quality.

One thing to note is the handle design. I have a Rheem tankless heater, and I had no trouble with the valves clearing the wall. However, if you have a low profile unit, you may encounter some issues, as others have mentioned.

I have used these valves on four different tankless water heaters, and I have not had a single problem with any of them. They are reliable and durable, which makes them worth the investment.