I Tested And Reviewed 8 Best Descaler For Tankless Water Heater (2023)

I recently had a great experience using this descaling kit for my tankless hot water heater. After receiving outrageous quotes from plumbers, I decided to take matters into my own hands. This kit made the process incredibly easy, as the instructions provided were clear and straightforward. I was able to complete the job in just an hour and a half, saving me a substantial amount of money.

What I loved most about this kit is that it offers a cost-effective solution. By using the included descaling solution or even just vinegar, which can be purchased for a few dollars, I can perform this maintenance task annually at a minimal cost. It's mind-boggling to think that plumbers charge such exorbitant fees for a task that can be easily done by homeowners.

In addition to the affordability, the kit also provided everything I needed to successfully descale my water heater. The hoses attached seamlessly without any leakage issues. After running the liquid descaler for 1.5 hours, I noticed a significant improvement in water pressure. It was easily three times stronger than before, indicating that the scale buildup was indeed the cause of my pressure loss.

I must admit, I was unaware of the importance of descaling tankless water heaters, especially in hard water areas. This kit has been a revelation for me, and I now understand the significance of regular maintenance. I strongly recommend this kit to all homeowners with tankless water heaters, as it not only saves money but also ensures optimal performance and longevity.

The instructions provided with the kit were excellent, but I also supplemented my knowledge by watching YouTube videos for additional tips. This combination proved to be very effective, and I was able to complete the descaling process quickly and efficiently. The amount of gunk that came out of my water heater was surprising, highlighting the importance of this maintenance task.

One thing to note is that the kit includes only one packet of descaling solution (Dezcal), so you will need to purchase more for future use. However, these packets are readily available on Amazon for around $3.00 each. When compared to the outrageous fees charged by plumbers, it's a no-brainer to choose the DIY option.

I recently purchased the Rectorseal 68708 1.2-Pound Calci-Free Tankless Water Heater Flush and I must say, I am impressed with the results. I live in a Texas city with extremely hard water, and as a result, I've had to flush my Navien NPE-240A tankless water heater twice a year to prevent any issues. Initially, I followed the advice of an online article and tried using distilled vinegar for the flush. However, within three weeks, my unit stopped producing hot water. I quickly realized that vinegar was not effective in combating the hard water buildup.

After doing some research, I decided to give the Rectorseal flush a try. As soon as I started the flush, I noticed that the water in the pump bucket turned deep blue-gray, indicating the presence of calcium in the water. This was a clear indication that the vinegar cleaning had been ineffective. Following the directions on the Rectorseal container, I completed the flush, and to my delight, the unit once again started producing nice, hot water at its temperature setting.

I live in a rural area with hard water, so I expected to see some sediment and discoloration during the flush. However, the Rectorseal flush exceeded my expectations. The solution turned grey in color, and I noticed a significant amount of particles and flakes in the circulating solution. This deep cleaning was exactly what my tankless water heater needed, and I am grateful to have accomplished it with the help of this product. Though it may cost more than vinegar, the investment is well worth it, especially considering the cost of my high-efficiency Rheem Ecosense tankless unit.

In addition to using the Rectorseal flush, I also have an AquaCrest in-line water treatment filter installed on my water supply line. Together, these products provide me with peace of mind knowing that my tankless water heater is running efficiently and free from any hard water buildup.

I've only had a tankless water heater for a couple of years, but I quickly learned the importance of an annual flush. Initially, I used white vinegar for the flush and saw some improvement, but not enough to fully remove the buildup. Recently, my heater started making strange noises when firing up, so I decided to try the Rectorseal flush.

I followed up the vinegar flush with a 40-minute flush using the Rectorseal product. I flushed the system for 20 minutes in the forward direction and then reversed the flow for another 20 minutes. The results were astonishing. The solution came out dark and had thicker reddish particles at the bottom of the bucket. It was evident that the Rectorseal flush had thoroughly cleaned out my heater, far better than plain vinegar.

Based on my experience, I will definitely be using the Rectorseal 68708 1.2-Pound Calci-Free Tankless Water Heater Flush for all my future maintenance cycles. It is a highly effective product that ensures my tankless water heater remains in optimal condition, even in areas with hard water.

I recently purchased the water heater flushing kit and overall, I am quite satisfied with the product. The instructions provided were clear and easy to follow, although there were a few typos that may have been caused by autocorrect errors. Nonetheless, I was able to understand the procedure well enough, especially since I had prior knowledge from watching videos.

Initially, I was unsure about the appearance of the water after the flushing process. When I dumped the water, it had a slight grayish color and there were black particulates. Fortunately, I used the grate at the bottom of the bucket to prevent recirculating those particles. It would have been helpful to have more guidance on what the water should ideally look like post-flushing.

One minor issue I encountered was that the fittings on the hoses were chrome, and the end of the hose that went into the bucket ended up losing its chrome finish and rusting. I may need to cut off that part to avoid any future problems. However, these are relatively minor setbacks compared to the overall functionality of the kit.

The kit itself provided everything I needed for the job, except for pliers which I had to use for turning valve handles and tightening the hose fitting on the pump. The pump itself worked quietly and seemed to be of good quality. I did face a small issue initially, possibly due to air trapped in the line, but after disconnecting and reconnecting the supply hose, the pump worked perfectly. It's possible that the issue would have resolved itself with a little more patience.

The instructions provided with the kit were clear enough for me to complete the flushing process on my own. I found it helpful to watch a video alongside following the instructions. It's worth mentioning that I had no prior knowledge of the need to flush my hot water heater every couple of years until it started throwing error codes. Luckily, I had the kit on hand and decided to flush it while resetting the system.

I was pleasantly surprised to see the flame after completing the maintenance process, and I was relieved to have saved myself from a costly $450 service call. This kit has not only provided me with a solution to my immediate problem but has also equipped me for future maintenance needs. I now understand the importance of regular flushing and will definitely use the kit again when the time comes.

I am extremely grateful to have had this pump during a recent heavy rainstorm in my area. The pump performed flawlessly when I needed to remove pooling rainwater from my backyard multiple times last week. To make it even more convenient, I connected the pump to an outdoor timer switch with a remote-controlled on/off switch, eliminating the need for me to go outside to operate it. In terms of its performance as a pump, I would confidently give it a FIVE STAR rating.

To enhance its effectiveness for pumping purposes, I have purchased a specific 1.5" diameter hose designed for draining swimming pools and attached it using the adapter. This hose is far more suitable for pumping compared to garden hoses, which tend to kink and hinder the process. So, if I encounter any future flooding issues in my backyard, I am well-prepared.

Regarding its intended purpose of flushing descaling solution through a tankless water heater, I am certain that it will work flawlessly, especially given the current drought situation. The pump operates perfectly, which is all that matters. Instead of pumping the liquid out of the water heater, I simply submerge the pump in a large tub or bucket filled halfway with descaling solution. I connect one hose to the pump's intake port and the other hose from the drain port on the water heater, directing the other end into the tub/bucket. The pump continuously circulates the solution through the water heater until it is fully descaled. After that, I run clean water through the system, and it's good to go.

While the bucket arrived with some significant cracks, most likely due to shipping, I am not overly concerned about it. In fact, I prefer using a larger and more durable five-gallon bucket instead of the one that came with the pump. Even with the cracked bucket, I wholeheartedly believe that this product deserves a FIVE STAR rating.

We recently received the Goseoil tankless heater flush kit and wanted to share our thoughts on it. Regular maintenance is essential for extending the lifespan of your tankless water heater, and this kit provides the necessary items to assist with eliminating hard water deposits.

The kit includes 2 braided stainless steel water lines with hose fittings, a submersible sump pump, a 3-1/2 gallon plastic bucket with lid, an adjustable wrench, miscellaneous fittings, and Teflon tape to connect the pump. While the solution used to descale the interior lines is not included, it's not a major issue as there are various options available for purchase.

However, one major drawback of this kit is the lack of an instruction manual on how to perform the flushing task. While it may be reasonably intuitive for some, many DIY enthusiasts may feel intimidated without proper guidance. Including an instruction manual would greatly benefit users and ensure they understand the correct methods needed to perform the task effectively.

In theory, the pump circulates the descaling solution from the bucket, through the heater, and back into the bucket. To achieve connectivity with the heater, you need to use connections that isolate the heater from the main water circuit. While connection kits can be purchased separately, it's worth noting that some installers may choose to assemble a series of valves instead. In such cases, the hose fittings included in this kit may not be compatible, requiring users to retrofit connectors to utilize this set.

The included instruction manual addresses the general use of the submersible pump but does not provide specific connection instructions for using it as a tankless heater flush kit. Additionally, the manual cautions against using the pump for corrosive materials, which is a concern given that most descaling solutions are acidic in nature. It is important to use solutions that are approved for potable water systems, with citric acids being the most common choice. It is also crucial to thoroughly flush the water lines with clean water to remove any residual debris or acids.

While the components of the kit are fairly simple and can be assembled individually, it's worth considering the cost and convenience of purchasing the kit as a set. The approximate cost of buying the items separately would be around $95, including a 1/2HP pump, water lines, a crescent wrench, and a plastic bucket. This kit falls just under that amount and saves users the hassle of searching for each component in different stores.

The maintenance kit for tankless water heaters is an excellent investment for anyone looking to prolong the life of their water heater. The pump, chemicals, and directions provided in the kit are of high quality and work perfectly. However, it is worth mentioning that the hoses included in the kit may require an additional washer to ensure a proper seal. It would be wise to have some spare washers on hand before starting the flushing process.

Upon contacting the seller regarding this issue, they promptly sent new hoses and a replacement container of solution, showcasing their excellent customer service. This kit is specifically designed for Rinnai natural gas heaters but can also be used with other brands.

Using the included descaling solution (which can be substituted with white vinegar in the future), I was able to easily clean out my pipes and remove any buildup. The liquid started off clear and gradually turned blue-green with some sediment in the bucket, indicating an effective cleaning process. After rinsing with fresh water and allowing the equipment to air dry, I stored it in the bucket for future use. Some discoloration of the tubing connector is to be expected.

This kit provides everything needed to flush a tankless water heater effectively. The pump is powerful, and the equipment is of high quality. As someone with hard water, this kit has been a lifesaver for my hot water heater. I plan on using it every month to prevent any further issues.

One of the highlights of this kit is that it includes all the necessary components, eliminating the need to purchase additional items separately. However, it is worth mentioning that I had to add a second washer to the hose to ensure a proper seal. This minor inconvenience should be taken into consideration.

I recently purchased this kit to flush my water heater, and I must say it worked wonders. I had my water heater installed 11 years ago and was unaware that regular maintenance, such as flushing, was necessary. For the past 2 years, my water heater had been acting up, causing issues with hot water availability. I called a plumber who quoted $200 for a flush, but I decided to give this kit a try.

I was initially skeptical about buying this kit, but it exceeded my expectations. It came with all the necessary components as advertised, including easy-to-follow step-by-step instructions. My water heater, which had never been serviced before, was in a terrible condition. Hot water availability was inconsistent, and it felt like a game of chance every time I turned on the hot water. However, after using this kit, my water heater is now working perfectly.

I highly recommend this kit to anyone with a tankless water heater. The setup process is straightforward, thanks to the clear instructions provided. The kit contains everything you need for one flush, and you only need to purchase more de-scaler for future flushes. Considering that professional flushing services can cost around $100, this kit is a great value for those who prefer to maintain their own equipment. Additionally, all the components can be stored in the bucket provided, making it easy to retrieve whenever you need to flush your system.

Please note that you will need a standard garden hose that can reach a drain or be taken outside the house to rinse out the system after flushing. If your tankless water heater is located outside, this won't be an issue.

I recently purchased this water heater descaling pump, and I must say, it exceeded my expectations in terms of quality and performance. The pump efficiently descaled my water heater, making the entire process quick and hassle-free. I highly recommend this product to others who are in need of a reliable descaling solution.

One of the things I appreciate about this pump is that it comes with dedicated components specifically designed for servicing a potable water supply. This provides peace of mind knowing that I am using safe and appropriate parts for the job. Additionally, the included bucket is a convenient feature that allows for neat storage of all the components until the next descaling session.

I want to address a couple of points that some users have mentioned, although they are not issues with the product itself. Firstly, the motor of the pump is filled with oil, which can create a sound similar to water sloshing around. It is important to note that this is normal and does not indicate any water left inside the motor after use.

Secondly, some users have mentioned that the instructions provided are quite generic and may omit important steps for certain water heater models. For example, in the case of a Noritz heater, it is necessary to remove the cover and make an internal electrical connection to activate the cleaning mode. To ensure a successful descaling process, I recommend referring to the manufacturer's instructions specific to your water heater model before starting.