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Watts Tankless Water Heater Service Valve Kit

4.4 4.4 out of 5 stars 675 ratings

Currently unavailable.
We don't know when or if this item will be back in stock.
Material Copper
Brand Watts
Item dimensions L x W x H 8 x 10 x 3 inches
Exterior Finish Brass
Inlet Connection Size 0.75 Inches
Inlet Connection Type threaded
Specification Met NSF, ansi
Valve Type tankless water heater valve sensor

About this item

  • TANKLESS WATER HEATER VALVE KIT: Watts LFTWH-FT-HCN service valve kit for tankless water heater valves simplify the installation, maintenance and operation of tankless water heaters.
  • SERVICE VALVE KIT FOR TANKLESS WATER HEATER: The tankless water heater service valve kit replaces up to 18 fittings and 16 connections used in typical tankless water heater installations, color-coded tee handle. Optional pressure relief and check valve.
  • MULTIPLE CONNECTION VALVE KIT: They are available in two valve sets or as a single valve with female threaded, union or quick-connect end options. The service valve kits are available with or without a relief valve. Facilitate service and maintenance with cold water inlet and hot water outlet valves certified to NSF/ANSI 61.
  • LEAD FREE VALVE KIT: The wetted surface of our Lead Free products contacted by consumable water contain less than one quarter of one percent (0.25 percent) of lead by weight.
  • WATER SERVICE VALVE KIT: Purge/drain ports allow regular cleaning to remove scale build-up. The kit includes LF4L - Lead free poppet type pressure relief valves for protection against excessive pressure and LFTWH - Lead Free Tankless Water Heater Valves.
See more product details

Customer ratings by feature

Easy to install
3.3 3.3
Value for money
3.1 3.1

From the manufacturer

watts, watts premier, instant hot water recirculating pump, recirculating pump, recirculating system
Tankless Hot Water Heater Valve Kit

Watts Tankless Water Heater Kit

Simplify the installation, maintenance, and operation of tankless water heaters with Watts Series THW Tankless water heater valves. Replace a bucket of fittings and potential leaks with our one-piece assemblies. Watts Series TWH valves are available in two valve sets for both hot and cold water with 3/4-inch female threaded union brass fittings.

Why install a Tankless Hot Water Heater Kit?

Hot Water Service Kit

water, filter, family., watts water, tankless hot water service kit

tankless water heater service kit

Save Installation Time

Full port, quarter-turn ball valves with color-coded tee handles for fast water heater isolation. Replace up to 18 fittings and 16 connections!

Easier, Faster Service

Integral purge and drain valve for convenient water heater draining and for simplifying water heater flushing operations.

Superior by Design

Full-port ball valve design never compromises relief valve operation. And, these valves can handle up to 600psi.

Installing Your Water Heater Service Kit

tankless water heater service kit

tankless water heater service kit

tankless water heater service kit

tankless water heater service kit

Hot Water Valve

This valve can be identified by the red insulator handle. The top should be connected to the tankless water heater. This should be installed into the hot water outlet on your water heater.

Cold Water Valve

This valve can be identified by the blue insulator handle. The top should be connected to the tankless water heater. This should be installed into the cold water outlet on your water heater.

Pressure Relief Valve

This silver test lever helps to reduce any pressure in the system. Sealant should be applied to any exposed threads of the pressure relief valve to ensure best use.

Thread the pressure relief valve into the 3⁄4" port on the side of the hot water valve and hand tighten. Using a wrench, tighten the pressure relief valve until the discharge on the pressure relief valve is positioned downward on the isolation valve.

Product Description

Product Description

This Watts Series THW Tankless water heater valves are designed to simplify the installation and maintenance of tankless water heaters They replace up to 18 fittings and 16 connectors used in typical tankless water heater installations Available in two valve sets for both hot and cold water with 3/4-inch female threaded union brass fittings

From the Manufacturer

This Watts Series THW Tankless water heater valves are designed to simplify the installation and maintenance of tankless water heaters They replace up to 18 fittings and 16 connectors used in typical tankless water heater installations Available in two valve sets for both hot and cold water with 3/4-inch female threaded union brass fittings

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here. [PDF ]

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Watts Tankless Water Heater Service Valve Kit

Watts Tankless Water Heater Service Valve Kit


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Watts Tankless Water Heater Service Valve Kit
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PriceCurrently unavailable.$50.99$61.99$55.99$49.99$52.85
Delivery
Get it as soon as Friday, May 24
Get it as soon as Friday, May 24
Get it as soon as Friday, May 24
Get it as soon as Friday, May 24
Customer Ratings
Easy to install
3.3
5.0
5.0
4.6
4.6
4.4
Value for money
3.1
5.0
5.0
4.3
4.5
4.3
Easy to use
5.0
4.6
4.7
4.6
Sold By
Boltigen Global
Usparky
well1314
Xiny Shop
Efield USA Inc
material
Copper
Brass
Brass
Clean Brass
Brass
Brass
inlet size
0.75
0.75
0.75
inlet type
threaded
National Pipe Tapered
threaded
Full port
Full port
National Pipe Tapered
exterior finish
Brass
Brass
Brass
Brass
Brass
Brass

Customer reviews

4.4 out of 5 stars
4.4 out of 5
675 global ratings
Great valves, but you have to really work them.
4 Stars
Great valves, but you have to really work them.
This are some great valves, and made installing a tankless hot water heater in a tight space go smoothly. However, I am knocking one star because I did have to repeatedly tighten them, and I mean really tighten these things, at the union to keep them from dripping a small amount of water.
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Top reviews from the United States

Reviewed in the United States on February 19, 2016
Installed these today with no issues at all. They are well made and easy to work with.

I think it's important to mention that you need to use thread tape (or equivalent) on the pieces you connect to the valves. They are tapered fittings and therefore do not use o-rings to seal, they seal against the male threads, and those male threads need to have thread tape (teflon tape, pipe tape, etc) on them or you will not have a good seal. I think most of the negative reviews are from people who's biggest issue is user error.

Mine came with the pressure relief valve. Have read some reviews where people say they didn't get that part. Mine was shipped by Handyman Direct. Thank you Handyman Direct!
Reviewed in the United States on October 7, 2015
Very well made valve. It arrived within two days. i got the valves installed and turned the water on. I had a leak. took the leaky valve apart on found that the O-Ring was missing. I guess I should have looked at it first. I went to big box store on Sunday and was able to find another O-Ring.All works fine now.
Thanks
Ernie
Reviewed in the United States on September 22, 2014
While remodeling my basement I also changed most of my water pipes in the house. When my Navien CH-240 was installed, the plumber did not use a valve kit, so to remediate this I purchased this valve kit. I also purchased the  Noritz IK-WV-200-1-TH-LF 3/4-Inch Lead-Free Threaded Tankless Isolation Valve Kit with 500,000 BTU Pressure Relief , because it looked similar at a better price point. Well well, guess what? They are one and the same!!! The Noritz only changed the handles (to have their own logo on them), other than that this is identical to the Watts. What am I saying, this is the Watts with different handles. BUT, what even nicer, it comes with the pressure relief valve as well (a Watts as well)! If purchasing the Watts kit, you need the relief valve, so the price would be much higher! So if I were you, I would just get the Noritz since it is one and the same, and you get the pressure relief valve included for a much lower price!

As far as how it works, I installed the Noritz and it works great, with no leaks. Since they are identical I count as reviewing this one as well.

EDIT: When I purchased these they were both sold and fulfilled by Amazon. Noritz was about 80 bucks and Watts a little over 100 bucks.
5 people found this helpful
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Reviewed in the United States on April 24, 2017
I wanted to be able to easily maintain the new ECO 18 tankless water heater. After doing a little research these valves seemed to be one way to keep the ECO 18 clean and in good shape. My plumber installed them when he installed the tankless water heater. I haven't had to flush the system - I'll be back in 6 mos. to let you know if they work as planned and make my maintenance on the ECO 18 easier.
Reviewed in the United States on July 11, 2016
Very impressed with the quality but was surprised with all of the products included. If the order had been placed before the heater had been installed all of the items would have been great but in my case some were redundant.
Reviewed in the United States on September 10, 2019
Missing gaskets. Leaky Union. The same problems that others had reported, but I missed them before when buying these. However, I had already scheduled these to be installed by a professional plumber as part of my tankless water heater project. He went hunting for a set of gaskets and applied thread sealant to the union. Problems solved. This kit shouldn't have had any of these problems in the first place.
One person found this helpful
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Reviewed in the United States on August 24, 2018
Seemed like a bad idea to spend ~65 bucks for something I could get at a store for maybe 20 bucks.. well you think that until you get them. If I had a kevlar sock I could kill a bear with these. High quality. Very very robust. Hell you just spent 5 to 9 hundred on the tankless, buy these you'll wish you had.
3 people found this helpful
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Reviewed in the United States on May 16, 2013
Surprising to me how much these cost, but the price seems to be about the same across manufacturers. Not a piece to save a few bucks on, as the cost of replacement is too high and failure even higher.
Note that if you are using this with a pressure relief valve, you will need to get one with a short probe/stem-thing that goes inside the pipe. The ones for sale at my local hardware store all had probes which were too long, like the ones used with a water heater. I was using mine with a tankless heater.
11 people found this helpful
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Top reviews from other countries

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Don Drozda
5.0 out of 5 stars Great quality
Reviewed in Canada on January 14, 2020
Very well made lots of brass
Ulises de la Garza
5.0 out of 5 stars Calidad y rapidez en la entrega
Reviewed in Mexico on August 31, 2018
Excelente calidad precio y rapidez en entrega lo recomiendo ampliamente
Jesse
5.0 out of 5 stars Work well
Reviewed in Canada on November 19, 2019
Work well. No issues
justin
4.0 out of 5 stars makes isolating and cleaning easy
Reviewed in Canada on September 21, 2014
A good valve to have when installing a tankless water heater. Easy to install, but a little difficult to tighting the top lock nut enough so that it does not leak.
One person found this helpful
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Terry
5.0 out of 5 stars It does what the add says
Reviewed in Canada on August 20, 2019
Good product.