5 Best Tankless Water Heater Flush Kits
Tankless water heaters are marvels of convenience and efficiency. However, as efficient and economical as they are, these tankless water heaters need regular maintenance, just like any other appliance. Tankless water heaters need to be regularly flushed and descaled to maintain their efficiency
Minerals in your water are the chief enemy of a tankless water heater. Over time, the minerals build up in the internal components. This scale buildup in the plumbing of the water heater reduces the heater’s efficiency. In time, scape buildup can reduce water flow and cause components to fail. Routine maintenance can reduce these problems.
| Flush Kit | Size of Pump | Are Hoses Included | The most impressive feature of this kit |
| Kelaro Tankless Water Heater Flushing Kit – Just add Vinegar Descaler | 1/8 HP | Yes | Uses standard household vinegar to descale the water heater. No harsh or dangerous chemicals |
| Superior Pump 91660 Tankless Water Heater Descaler Pump Kit | 1/6 HP | Yes | A slightly bigger pump that can handle moving some solids is a benefit |
| Chromex Tankless Water Heater Flush Kit with Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump | 1/6 HP | Yes | Includes Liquid descaler and a pump platform to protect the pump from sediment and solids |
| Eccotemp EZ-Flush System Descaler Kit with Pump and Solution, Durable Tankless Water Heater Flushing Kit | 350 GPH | Yes | A self-contained design means no separate pump and bucket. |
| DrainX Tankless Water Heater Flush Kit | 1/6 HP | Yes | Six-foot hoses give you added reach for water heaters mounted in hard to access locations |
Fortunately, routine maintenance on a tankless water heater is easy and quick if you have the proper equipment. To perform a good flush of your tankless water heater requires several components. You will need a small pump, a bucket or other vessel to hold the cleaning solution, and the necessary hoses to connect to your water heater.
Many homeowners are wary of using chemicals to flush and descale their tankless water heater. They fear contaminating their water system and the potential harm these chemicals can produce. Kelaro understands this concern and provides a solution by using common household vinegar as the descaling solution.
What’s In the Kit?
The Kelaro tankless water heater descaler kit is complete except for two gallons of common vinegar. Each Kelaro kit contains:
- One 1/8 horsepower circulating pump
- One 3.5 gallon plastic bucket
- Two color-coded six-foot steel braid jacket hoses
- Complete instructions
All you need is two gallons of regular household vinegar to descale and flush your tankless water heater effectively. Most users report that the flush and descale take about forty-five minutes.
How Easy is it to Use This Kit?
The Kelaro tankless water heater flush and descaler is simple to use. You connect the color-coded hoses to the pump and the isolation valves on your tankless water heater using the supplied instructions. The step-by-step process is easy to follow and almost foolproof.
You don’t need any special tools or expert knowledge to flush your tankless water heater with this kit. You could hire a plumber to do this job, but with a Kelaro flush kit, you have the tools to do your maintenance regularly with only one upfront investment.
How Users Respond to This Kt
Purchasers and users of the Kelaro tankless water heater descaler kit are uniformly impressed with the simplicity and ease of use. Most comments follow a similar set of themes.
- The easy-to-follow color-coded instructions matched the pump and hoses. The instructions made the process much faster and easier.
- Using vinegar is much preferable to the other harsh chemicals some kits include. We found out that the manufacturer of our tankless water heater recommends vinegar over harsh chemicals.
- This is a complete kit. The bucket is great for storing the pump and hoses after you descale your water heater.
A few users complain that the connectors on the hoses don’t seal well and may leak.
What We Think
Vinegar is a natural descaler and cleaning agent. We think that using vinegar instead of harsh chemicals is a great choice. The Kelaro Descaler kit makes our list for several other reasons.
- Quality components useable repeatedly spreading the initial cost of time
- Clear and easy to understand instructions with color codes for easy visual reference
- It makes maintaining your tankless water heater much less labor-intensive
Large tankless water heaters may need more circulation capacity to remove scale deposits effectively. The Superior Pump tankless water heater descaler kit meets the demands of the largest whole house tankless water heater.
What’s in the Kit?
Each Superior tankless water heater maintenance kit is complete. These kits are ready to go to work as soon as they arrive. In each kit, you will find:
- One 3.5 gallon bucket with a sealable lid
- One 1/6 HP utility pump that flows up to 1960 gallons per hour
- Two stainless steel hoses
- One seven-ounce package of descaler
- Complete instructions with a step-by-step guide
You do need to mix the descaler product with water before you start the process. This descaler product is non-toxic and non-corrosive to pipes and fittings.
How Easy is it to Use This Kit?
This tankless water heater maintenance kit is easy to use, and the detailed instructions lead you through the process. Mix the descaler into the water and connect the pump to the appropriate isolation valves on your tankless heater to begin. The larger pump moves more descaler solution through the tankless water heater for improved descaling performance.
How Users Respond to this Kit
Users of the Superior Pump tankless water heater descaling kit uniformly give high ratings. The ease of use of this kit is a primary point, but many users have other comments to share, such as:
- This is a superior kit. The quality of the hoses, connections, and pump is above reproach.
- Not only is this kit easy to use, but the pump is also extremely quiet and efficient.
- The descaler powder seems to work very well. I was surprised at what came out of my tankless heater on the first flush.
The chief complaint we saw was the quality of the packing. In some cases, the descaler package breaks open in the box and is unusable.
What We Think
If your tankless water heater is larger and serves your whole house, then the Superior Pump tankless water heater descaler kits are a good choice. We have several reasons to add this kit to our list.
- The larger pump makes this the kit to use on larger whole house tankless water heaters
- Powdered descaling powder is much more convenient than liquid solutions
- The quality of the hoses and fittings are above par and inspire confidence in the setup.
If the thought of mixing your descaling solution from a powder seems like too much trouble, you might consider a kit that includes a liquid descaler. The Chromex tankless water heater flush kit includes a liquid descaling solution for easy mixing and use.
What’s in the Kit?
Each Chromex tankless water heater descaling kit is complete and ready to use. Each kit comes complete with the following.
- One five-gallon plastic bucket
- Two color-coded rubber connection hoses
- One 1/6 horsepower pump
- One pump lift table
- One bottle of liquid cleaning solution
- Complete step-by-step instructions
You must mix one quart of the liquid descaling solution with one gallon of water. No other mixing or measuring is required.
How Easy is it To Use This Kit?
Chromex makes descaling and flushing your larger tankless water heater as easy as connecting two hoses and plugging in the pump. The included pump table keeps your pump intake above the bottom of the bucket to prevent picking up sediment and recirculating it through your water heater. Color-coded hoses and complete instructions guide you through the process quickly and easily.
How Users Respond to this Kit
Users are generally positive in their reviews of the Chromex descaling and water heater maintenance kit. Users, by and large, found this kit to be easy to use and well-constructed. Other comments followed these topics.
- This kit performed flawlessly. The connections were easy to make, and the descaling solution seemed to work well.
- Follow the directions and let the pump do the work. You do need to make sure all the connections are tight. Otherwise, you can get a spray of cleaning solution
- The instructions are clear and precise. If you do have a question, the customer service at Chromex is superior.
Some users note that the red return hose may tend to come out of the bucket when the pump is running. They advise securing the end of the red hose with a clamp of some sort.
What We Think
We like the design of this kit. The pump table helps keep the pump in a clean solution and gives sediment a place to gather. All in all, we put this kit on our list because:
- The instructions are clear and precise. Combined with the color-coded hoses, the chance for error is low
- The liquid cleaning solution is handy. No mixing or powders to get to dissolve.
- The larger bucket gives some room for error with the water and cleaning solution.
Convenience is always a big factor. The Eccotemp EX-Flush tankless water heater descaler kit is the epitome of convenience. The pump mounts inside the water reservoir housing, and you make the connections outside the container. No separate pumps, buckets, or filters.
What’s in the Kit?
Every Eccotemp EZ-Flush descaler kit is complete, including step-by-step instructions. When you receive your kit, you will find:
- One EZ-Flush pump and tank assembly
- One carrying strap
- One power supply
- Two connection hoses
- One bottle of Eccotemp descaler solution
- One instruction and user manual
The kit is small and easily portable. There are no large buckets or separate pumps. The fully integrated system has all the connections and controls mounted on the pump enclosure for easy access.
How Easy is it to Use This Kit?
The setup and use are easy. Plugin the power supply to the wall outlet and the pump unit. Connect the hoses as instructed in the user manual. Add the cleaning solution and turn on the pump. In just a few minutes, the cleaning cycle is done.
The user manual is clear and offers suggestions and tips for maintaining your tankless water heater. Everything stores neatly inside the pump system when you are done with your descaling project. The shoulder strap aids in moving the unit around your home.
How Users Respond to this Kit
Overall, users give this kit higher than average marks Comments from users of the Eccotemp EZ-Flush system point out their likes in these areas.
- The all-in-one design of the Eccotemp flush system is superior to other kits that have everything separate.
- The convenience of this kit is phenomenal. The connections are easy to make, and the unit operates quietly.
- The compactness of this descaler is a big plus. It is much easier to store and use than a five-gallon bucket and a larger pump.
Some users reported problems with the pump after the first use, mainly due to inadequate flushing of the pump. Eccotemp customer service does respond well to these problems.
What We Think
For convenience and easy storage, the Eccotemp EXZ-Flush system is unbeatable. The all-in-one design wins our thumbs up for innovative engineering. We also like several other features of this descaler kit.
- Easy to use with easily accessible brass couplings on the pump housing.
- Clear and well-prepared documentation with step-by-step instructions
- Quiet operation makes flushing and descaling less of a chore
One issue that we did note about the Eccotemp EZ-Flush system is the smaller pump. The EZ-Flush system may not be suitable for larger whole house tankless water heaters.
There are times that one extra foot of reach is all it takes to make a job easier. The DrainX tankless water heater flush kit includes two six-foot connection hoses to give you that last bit of reach.
What’s In the Kit?
You won’t find anything missing when you open the DrainX kit. The kit is complete with the following items.
- One 3.5 gallon plastic bucket with a sealable lid
- One 1/6 horsepower electric pump
- Two steel-clad six-foot hoses
- Complete instructions and how-to guide
You should note that this kit doesn’t contain any powdered or liquid descaler. DrainX recommends that you use common household vinegar to descale and flush your tankless water heater.
How Easy is it to Use this Kit?
Like most other descaling and flush kits hooking up the hoses is the hardest job. If your water heater is in a closet with limited accessibility, the longer hoses included with this kit can be advantageous. Using vinegar keeps the mixing to a minimum and doesn’t involve toxic or harmful chemicals.
If you follow the included easy-to-read directions and the how-to guide, you can quickly and efficiently descale and flush your tankless water heater in as little as 30 minutes.
How Users Respond to the Kit
Users of the DrainX descaling and flush kit for tankless water heaters find this product overwhelmingly superior. Reviews of this product all rank in the highest categories. Users of the DrainX kit generally report the following.
- We never thought of using vinegar until we got the DrainX kit. It works great and is much cheaper and safer than the other products.
- The longer hoses make this kit much easier to use on our tankless water heater.
- The resealable lid keeps everything in place and protected when the kit is not in use.
The DrainX kit is a great kit for descaling and flushing even the largest of tankless water heaters. The pump is strong and durable and should give years of positive service.
Keep the Hot Water Flowing
Maintenance is a key issue, especially with tankless water heaters. If scale and minerals are allowed to buildup in the plumbing of the tankless water heater, there are several repercussions.
- Water flow through the heater will begin to diminish
- The heater will require more energy to deliver the same amount of heated water
- The scale and minerals can degrade the plumbing and fittings, leading to early failure of the water heater.
The key to maintaining your tankless water heater in the best operating condition is to adopt a regular maintenance schedule, including descaling and flushing. One of the kits on our list will help you keep your tankless water heater in top condition.
Dennis is a retired firefighter with an extensive background in construction, home improvement, and remodeling. He worked in the trades part-time while serving as an active firefighter. On his retirement, he started a remodeling and home repair business, which he ran for several years.
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