Tankless water heater valves are meant to help simplify the installation, operations, as well as maintenance of tankless water heaters.
These valves are actually used to replace up to 18 fittings as well as 16 connections, which are typically used in the installation of tankless water heaters.
There is a wide variety of tankless water heater valve kits on the market, but some are of higher quality than others.
For this reason, there is a need to know which brands are the best so that you can have get value for money once you decide to buy the product.
We have allocated many hours of research and testing, and we are sure that we have found some of the very best tankless water heater servicing valves available in the market. We have also shared a brief list of the various considerations that you should be mindful of when buying a valve kit online for your tankless water heater.
The following are some of the Best Tankless Water Heater Valve Kits on the market today:
Table of Contents
Top 3 Best Tankless Water Heater Valve Kit in 2020
1. Webstone 44443WPR Isolator – Best Tankless Water Heater Valve Kit
This is the most popular tankless water heater valve kit on the market today. This product comes with the following features:
Features
- It is lead-free: This is because the product meets all federal and state standards for lead levels in drinking water system components
- Has tankless water heater service valves
- Has a residential pressure relief valve outlet -150 PSI/200K BTU
- Has a high -flow hose drains- 500 WOG
- Size: 3/4 Inch
- Can be priced and sold individually or in cases
- 4444 series – IPS Union x IP
- Includes individually controlled drain outlets
- Has a full port brass ball valves with adjustable packing gland
- Has a manufacturer’s warranty on all components and workmanship
Pros
- It is certified to NSF/ANSI 61-8 and complies with the lead requirements of Annex G and AB1953
- Has an easy 2-step union connection
- A very good product when it comes to isolating a water heater
- The valves are made from heavy solid brass and are therefore very good quality products
- Has a hi-flow hose drain
- Has a warranty on all parts as well as workmanship
- Has the capacity to reduce leak paths.
- Diagnostic testing can easily be done by a single party
- You can clean the system without having to remove anything.
- Clear and easy to follow instructions on how to install the kit.
Cons
- The overly large yellow valve handles make it a bit difficult to fit where there is limited space
- The warranty is only valid where the valve kit is professionally installed and operated under normal conditions
2. Noritz IK-WV-200-1-TH-LF Lead-Free Threaded Isolation - Water Heater Installation Kit
This product is manufactured by Noritz America Corporation and is a very high-quality product that is also easy to install and maintain. The product comes with the following features:
Features
- Rated pressure relief
- Large handles for easy servicing
- A manufacturer’s warranty on parts and workmanship,
Pros
- Certification: The product is certified as frustration-free
- The compact all brass valve system has all the necessary on/off as well as maintenance ball valves that will help ensure that your hot water unit runs without electrolysis or impurities problems for a very long period of time.
- It does not need additional adapters for the pressure relief valve.
- It lasts for a long time because it’s made of solid brass
- The product is reasonably priced also the installation cost is very little.
- Comes with a warranty on parts as well as workmanship
Cons
- Some users complain that the hot water union fitting has a slow leak.
- It’s not ideal to use galvanized pipes to connect these particular valves because it implies introducing problems that will affect the performance of the hot water unit over time. This will end up shortening the useful life of this product
- The product is not eligible for international shipping.
3. Rheem RTG20220AB Webstone Tankless Water Heater - Best Water Heater Kit
This product is a hot and cold water service valve kit that is easy to install and maintain. It contains multiple valves and connections in a single part, thus allowing for easy installation and maintenance. It comes with the following features:
Features
- Service Valves
- Pressure relief valve
- Has a very high rating with users
- Clean brass that meets California Low Lead Codes requirements
- Warranty on parts.
Pros
- The hot and cold water service valves allow for simple installation as well as services through a combination of multiple valves and connections in one specific part
- Makes acid flashing quite easy, thus ensuring there is no lime build-up
- Has a long useful life because it is made of heavy solid brass
- The pressure relief is easy to drain, thus making it quite easy to maintain the tankless water heater
- You don’t need a separate drainage system because the valves come with an in-built drain.
- You don’t need a separate drainage system because the valves come with an in-built drain.
- Gives great performance because the valve kit contains a shut-off, flush adapter with cover, as well as diversion valve. It is also a high-quality product that is also designed to allow for easy installation.
- Gives you all the connections you need while connecting your tankless water heater.
Cons
- Some users say that the valves do not fit all Rheem heaters as the manufacturers claim
- They are a bit expensive
Things to Consider Before Buying a Tankless Water Heater Valve Kit
Once you have made a decision to buy a tankless water heater valve kit, you should ensure that it meets the following requirements:
- It is important to ensure that the valve kit you are intending to buy is compatible with the type of tankless water heater that you have.
- It should ideally meet all federal and state standards for lead levels in drinking water system components.
- It should have a manufacturer’s warranty on all its components as well as workmanship.
- It should be easy to install and maintain.
- Should be manufactured by a reputable company
- Should be a durable product: Essentially, the kit should be made using strong material such as brass.
- Should be reasonably priced.
- It should contain a pressure relief valve.
- It should ideally have fewer connections in order to reduce the time and cost of installation.
- It should be of the right size for your tankless water heater and also have front-aligned handles. This is to allow for easier positioning of the valve kit even where the available space is small.
- It should ideally have an integrated drain valve because it allows for quick and easy maintenance of the valve kit.
- It should ideally contain a captive nut and washer in order to reduce the risk of component loss during installation.
Final Verdict
A tankless water heater valve kit is a must for anyone who is intending to install a tankless water heater. First and foremost, these valve kits help make the process of installing tankless water heaters very easy and inexpensive.
In addition, they are associated with a lot of benefits for their users. They are compatible with various different types of tankless water heaters, meaning that they can be used widely. When it comes to cost, they are reasonably priced considering their quality and functionality.
Most users have rated these products very highly, with most of them giving them a 5-star rating. They are also solidly made and durable, meaning that you will use for a long period of time. Most of these valve kits also come with a warranty on parts as well as workmanship.
As a matter of fact, these valve kits are actually the perfect match for all tanks-less heaters. The most important thing is to ensure that you buy the right size and type of valve kit that is compatible with your tankless water heater.
Essentially, these products are worth their cost and will give excellent service for a very long period of time. You need to invest in one and experience great satisfaction with the excellent service it will provide for you.
[wptb id=5923]
If you need assistance on which valve to use and buy, feel free to contact us. We are just here willing to help you.

Hi, This is Luis. Author at “TheHeatersGuide”. I am a graduate in Mechanical Engineering. Currently researching on heating technology. However, I have learned many home heating techniques and still learning the home heating technolgy. And I love to share my research and reviews.