10 Best Tankless Water Heater Flush Kit [Review+Comparison] 2022

Are you experiencing a decrease in hot water flow? If you haven’t flushed your tankless water heater recently, the reduction might be because of a build-up of scale in the heater. Most manufacturers suggest flushing the heater at least once a year so that there are no sediment deposits.

If your heater is supplied with hard water, then the chances of rust and mud formation are too common. Hence, you immediately need a ‘Flush Kit.’ A tankless water heater flush kit flushes the unit without additional maintenance. It consists of all things required to clean the unit like the pump, hoses, tank, or bucket.

We’ve reviewed the 10 best tankless water heater descaling kits in this post. Check them straight!

Best Tankless Water Heater Flush Kits Reviews

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Last update on 2022-01-25 / Affiliate links / Images from Amazon Product Advertising API

1. Best Overall – My PlumbingStuff Tankless Water Heater Flushing Kit

Maintaining your tankless water heater is now very easy with this feature-packed flushing kit. It flushed out the water heater properly by ensuring optimal efficiency, improving the quality of water, and reducing debris buildup.

It has everything needed for adequate maintenance of the heater. The step-by-step instructions are easy to follow and allow connecting effortlessly.

Choosing it is a great way to manage your heater without having to buy any other equipment. It sounds promising and for all its qualities, we consider it overall a great flushing kit.

This kit contains literally everything needed to flush the water heater. It is easier than assembling flat-pack furniture.

Exceptional quality components get hand-tightened and are worth every penny. It clearly washed off the deposits from the copper pipes within the heater. No hard deposits, no sandy minerals at all!

The instructions are good and clear. It is a standard size and easy to get with a great working pumping system.

Features & Considerations

This tankless water heater flushing kit comes with 5-Foot SS hoses and one 32-ounce bottle. It includes a 5-gallon bucket and floor sucker pump. The Flow-Aide descaler is non-corrosive, non-hazardous, non-toxic, and biodegradable, which fortifies heavily with penetrating agents and wetting. It dissolves all impurities like mud, scale, rust, lime, and other deposits from the heater.

It includes everything needed to fully maintain the water heating system. The step-by-step instructions are easy to follow and perfect to maintain the water-heating system. You can connect easily to the isolation valves with the provided 5-foot SS hoses.

Last update on 2022-01-25 / Affiliate links / Images from Amazon Product Advertising API

2. Runner Up – KelaroTankless Water Heater Flushing Kit

Get everything you need in a single kit to flush your tankless heater. You don’t have to look for any external components as it comes with step-by-step instructions, which are easy to follow.

This kit is reusable and you just have to replace the cleaning agent. It works with Bosch, Rheem, Rinnai, Sitebel, Eccotemp, Tempra, Marey, and others. It is powerful enough to remove all layers, which get caked on the surface.

The setup takes only a few minutes. The pump is strong and performs efficiently making it very easy to carry out the process.

It cleaned the system and improved its efficiency to a great extent. Having this kit ensures you can flush the system more often. The big size bucket stores everything that you need to flush. The hoses offer a secured connection making it the best bet.

Features & Considerations

It is a great unit that can descale your heating unit in only 30 minutes. Perfect for contractors and DIY homeowners, it maintains the performance and extends the life of the tankless water heater.

It comes with an HP pump, 3.5-gallon bucket, 6 feet hoses with color, and a strong lid. The calci-free cleaner is more efficient than vinegar and leaves no odor at all. You can conveniently connect it to tankless isolation valves having 6 inches rubber hoses.

Last update on 2022-01-25 / Affiliate links / Images from Amazon Product Advertising API

3. Most Powerful Motor – Hercules 35235 Haymaker Descaler Kit

It is an all-in-one package for cleaning water heaters. Though the upfront cost is a little more, it saves you money in the long run. Easy instructions and simple procedures make it worth every penny!

Features & Considerations

It is a medium-sized unit with handy weight and holds everything you require to flush the tankless water heater. The pump is powerful and all its equipment is of extremely good quality. A perfect solution for regions with a hard water supply, it weighs only 10.5 pounds and serves all portable water units.

The chemicals, pump, and directions are apt. The premium quality construction ensures you never experience any issues while using it. The hose fittings provided with it are ideal for outdoor faucets. Hence, make sure it serves your heater before you finalize it.

Last update on 2022-01-25 / Affiliate links / Images from Amazon Product Advertising API

4. Superior Quality – Superior Pump 91660 Tankless Water Heater Descaler Kit

An efficient solution to clean and descale, this tankless water heater flush kit is a superior-grade product, which you will never regret buying. It is all stainless steel construction holding great durability and strength.

The pump is so strong that it serves not only residential but also hefty commercial applications. It is one of the highest quality products available at a fair cost. We considered every small detail of this unit and putting them all together makes it one of the most durable and best quality kits available on the market.

It is a new introduction in the market, which we really liked because it is made on the latest quality standards. The performance is impeccable for both electric and gas-powered heaters.

It held up well under all situations even when the water was extremely hard. It continued to perform even after multiple uses. It is a really amazing quality kit that tends to function well.

Features & Considerations

It features a utility pump that pumps up to 1920 gallons in an hour for up to 20 vertical feet. Its thermoplastic engineering holds resistance to corrosion and offers years of reliability and performance. The 1/6 HP superior pump is thermally protected and it easily cleans debris from entering into the impeller.

It includes two 6 ft, high-quality hoses made of stainless steel and ¾ inches garden hose thread designed to work with most of the heaters. The 3.5 inches gallon bucket comes with a top lid for easy transport, storage, and access.

Last update on 2022-01-25 / Affiliate links / Images from Amazon Product Advertising API

5. Compact and Portable – Eccotemp EZ-Flush System Descaler Kit with Pump and Solution

This flushing kit is a perfect fit for users who are looking for a compact and handy kit that is easily storable and can be conveniently carried. It not just cleans the heater but maximizes the heater’s lifespan. The non-toxic, non-corrosive cleaner is biodegradable and eliminates rust, limescale, and rigid buildups.

The kit is specifically created to work seamlessly with tankless water heaters and can also be used for cleaning ice machines as well as other water-based equipment. Hence, use this amazing performer to prevent the requirement for costly maintenance and repairs.

It is one of the nice units, everything in one, compact, and travel-friendly. It is all plastic, which is the only limitation of this product. Otherwise, it works extremely well especially when you follow all the instructions correctly.

Cleaning a tankless water heater for once ensures you don’t have to clean it again frequently. It is because the outcome is awesome. It is quiet when operating and does not require much power. The entire flushing process gets completed in just 30 minutes.

Features & Considerations

This premium quality flushing kit is an excellent way to descale all sorts of impurities on all water-based units. The compact size allows convenient storage and use. It comes with a built 350 Gallons per hour pump and includes 2 five-foot rubber hoses and 1 quart of Eccotemp descaling solution.

The easy-to-follow instructions are mentioned at its back, which makes it extremely convenient to use. The best part is that it is a reusable product. It keeps your water tank operating at full efficacy and makes sure it offers hot water for long-lasting years. So, get it now to flush out all impurities from your heater including scale, lime, and other blockages.

Last update on 2022-01-25 / Affiliate links / Images from Amazon Product Advertising API

6. Best for DIY Use – KelaroTankless Water Heater Flushing Kit

The kit comes complete and in wonderful condition. One of its great exclusivity is that the hoses are color-protected stainless braid and tend to be of superb quality. The pump is big enough to get the job done even if your water tank is big.

Super lightweight makes it flexible enough to keep things tight. It makes no leakages and is easy enough to use. If you run out of descaling solution, you can use vinegar to get adequate results. Just be a little careful when rinsing the pump and hose as vinegar could rust the metal really quickly.

Features & Considerations

To use this kit you need 2-3 gallons of white vinegar. You can also use other cleansers for flushing the equipment. The user-friendly directions make it a perfect choice for DIY homeowners.

It comes with a 1/8 HP pump, 3.5-gallon bucket, 6 Ft color-coded hoses, and a peel-off super flexible lid. The smooth connection to isolation valves ensures you get adequate outcomes for every use.

Last update on 2022-11-15 / Affiliate links / Images from Amazon Product Advertising API

7. Best Full-Size Kit – DrainXTankless Water Heater with DrainX Biodegradable Descaler

For unbeatable service, the DrainXheater descaling kit is an optimal choice. This professional kit is not the largest size but is powerful enough to descale almost any heater.

The lightweight and sturdy construction of this unit make it one of the most striking options available. You can carry it along easily as it weighs just 1.19 pounds. Though the price is slightly on the higher side, it is worth it!

This tankless water heater flushing kit stands with basic weather conditions and is perfect to use with heaters of all sizes. It does not damage even after multiple uses.

It comes with a biodegradable cleaning solution and does not involve any hefty maintenance. It does everything without leaving anything unfulfilled.

Features & Considerations

Featuring a 1/6 HP pump, it seems smaller in size but always delivers the bigger impact. The pump is certified to bring the best solution quicker than others. It includes two hoses each having a 3-feet length and offering you a 6-feet length.

It is an all stainless steel construction, and hence, is resistant to all sorts of damages. The cleaning powder with it is totally biodegradable. The solution is better than vinegar or other acidic solutions. The drum in the motor is made of metal and is long-lasting. It is easy to install and very convenient to carry.

Last update on 2022-01-25 / Affiliate links / Images from Amazon Product Advertising API

8. Environment Friendly Cleanser – Whitlam KITC FLOW-KIT

Descaling will be a lot easier and time-saving now with this powerful descaling kit. Easy to use and feature-packed, this kit comes with instructions, which are easy to follow. They are more informative and make sure users experience no hassles while using them.

It is 1 quart descale solution, which works effectively. The bucket is of apt size and does its job perfectly. A great way to clean your heater, it is a compact, space-saving design delivering amazing performance.

according to the editor satisfactory performance and efficiency, as it leaves no stains or marks behind. As a result, you get access to a clean and smooth hot water supply. The only negative they found is the leaky hose, which can be rectified if you tighten and connect it firmly.

Features & Considerations

This kit quickly dissolves water scale, rust, lime, and other water-based deposits, restoring the efficiency and performance of your tankless water heater. The descaler is a non-toxic solution certified to NSF/ANSI 60 for use as a cleaner in potable water systems.

It is uniquely created to dissolve the toughest deposits from almost any piece of water-based equipment. It is powerful yet safe and non-hazardous and non-inflammable.

Last update on 2022-01-25 / Affiliate links / Images from Amazon Product Advertising API

9. Best Budget Choice – Rheem RTG20124 Flush Kit

Saving costs will be much easier and possible now with this wonderfully designed Rheem kit. Using it implies you don’t have to engage in multiple occasions of cleaning. It is because it comes with proper cleaning instructions and features. Hence, it allows easy cleaning of all interior components.

Its easy installation saves a lot of time. It includes a big size bucket, which lets you pour in the solution and merge in the motor. The great thing is that even in the 5-gallon bucket, the pump functions perfectly without being completely submerged.

The bonus is a professionally laid manual provided with this kit. Everyone loved the big size bucket and powerful pump, which allows cleaning more than one heater with a single bucket solution.

The kit saves costs on numerous occasions. The descaling unit is so powerful that it easily cleans the interior components.

Features & Considerations

This unit features two hoses and a bucket used for solution storing. Each hose is 2-feet long, which gives a combined length of 4-feet. It is not the largest size, but still, feasible. The large bucket lets you pour in the solution and merge in the motor.

The rubber hoses are created to reduce their overall weight and make it easy to transport the hose to various locations. It is easy to use and assemble. The hefty pump manages well heavy-duty workload. The big advantage is that it is easy to connect and holds a simple setup, which saves a lot of preparation time.

Last update on 2022-01-25 / Affiliate links / Images from Amazon Product Advertising API

10. Best for the Price – Hercules 35235 Haymaker Tankless Water Heater Descaler

This is a unique water heater in a way that it is easy to work. It is a good choice for those who want to gain efficient performance. It can be used for all kinds of heaters.

It is powerful and flexible in terms of use. Also, the large bucket size allows the easy operation to get work done consistently at a capacity.

All its components are strong and powerful, and therefore don’t take many hours. It is capable of doing the work in just a few hours.

Features & Considerations

The kit comes with 2 hoses, a pump, and a haymaker. It removes sulfites, phosphates, oxides, rust, and other mineral deposits. 

The cleanser is a citric-based and VOC-free solution compatible with ABS, metal, CPVC, and PVC materials. It extends the life of the heater when used regularly.

Last update on 2022-01-25 / Affiliate links / Images from Amazon Product Advertising API

Buying Guide

What Makes a Good Tankless Water Heater Flush Kit for You?

A good tankless water heater flush kit is one that packs all essential components and tools needed for efficient cleaning of the water heater. It must fight all kinds of build-ups. The pump must be strong enough and there should be no requirement for further maintenance or buying additional equipment. There are more other factors that decide whether a tankless water heater descaling kit is good or not. Among them, the most important one is hard water.

• The hardness of Water Supplied to Your Tankless Heater

Water hardness refers to the number of mineral compounds it contains like calcium and magnesium. The level of water hardness varies from one area to the other.

The harder the water comes into your home, the more quickly mineral deposits will accumulate in the heater. If you stay in an area receiving very hard water, you need to service the tankless heater once or twice a year, and hence, you need a good flush kit for the same.

• What Size Tankless Water Heater Do You Have?

There are a variety of flush kits available in the market. While some serve all sizes of heaters, others cater to specific sizes only. Hence, do check the size of your tankless water heater before you pick a flush kit.

Try to pick a kit that can be used in all models whether it is electric-powered, gas-powered, or any other model.

• What Parts the tankless water heater flush pump Have?

The best tankless water heater flush pump must come together with a submersible pump, five-gallon flush tank, hoses, and a complete guide. It is designed in a way that it can boost the tankless water heater performance and can cleanse all its internal parts well. It must allow easy fixing of the tankless isolation valves.

• Whether It is Safe to Use or Not?

You must be able to safely use the tankless water heater flush kit. You must rely on it completely. The kit must be designed keeping into consideration all the latest safety guidelines. It must enhance the heater’s functionality and boost its durability.

Selection Criteria: How We Ranked the Best Tankless Water Heater Descaling Kit

When looking at various tankless water heater flush kits, we found a range of kits. Each kit comes with slightly distinct components. Here are some of the essential parameters to take into account.

1. High Performing Pump

For the finest flush kit, one must feature a strong pump with a powerful pump cycle. Most importantly, it must equip a 5-gallon tank for storing the solution and a lengthy hose. This hose helps to reach to extreme corners easily.

With the performance and unique design of the kit, it is possible to restore the heater’s performance and efficiently clean all internal components. It must-have technology to fit well into the tankless isolation valve conveniently.

2. Technical Designing

The heater must be designed not to be acidic. It must always be safe to use when the flushing is complete. It must not be too heavy nor too light.

3. Ease of Assembly

The flush kit must be easy to assemble. Its accessories come with convenient installation options and they must be attached with just a single push.

4. Descaling Solution

Some of the kits come with a separate descaling solution with a complete kit. The kit comes with a descaler so that it can be used for dissolving rust, mud, and scale easily.

Frequently Asked Questions

Final Words

Having said that, it is always best to have one of the tankless water heater flushing kits around when it comes to efficient cleaning without the hassle of seeking expensive professional assistance or buying each tool separately.