You may also like
Manufacturer Resources
Product Specs
- Application:
- Water Heater
- Body Material:
- Brass
- Country Of Origin:
- United States
- Inlet Connection Size:
- 3/4 IN
- Inlet Connection Type:
- Male Threaded
- Inlet Thread Type:
- NPT
- Maximum Temperature:
- 210°F
- Maximum Working Pressure:
- 150
- Outlet Connection Size:
- 3/4 IN
- Outlet Connection Type:
- Female Threaded
- Outlet Thread Type:
- NPT
- Pressure Range:
- 75 to 150 PSI
- Pressure Relief Setting:
- 150 PSI
- Pressure Steam Discharge Capacity:
- 370,000 BTU per hour
- Protection Type:
- Pressure
- Series:
- 3L
- Temperature Relief:
- 9999°F
- Test Lever:
- Yes
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Valves
- Product Type:
- Relief Valve
Watts W11917 – Frequently Asked Questions
1) Is the Watts 0011917 a T&P valve, or pressure relief only?
Pressure only. The Watts 0011917 is a poppet type pressure relief valve set at 150 psi, with protection listed as pressure. It will not sense water temperature, so if your water heater tank tapping requires a combination temperature and pressure (T&P) valve with a probe extending into the tank, this is not that part. Use it where a separate pressure-only relief is what the installation calls for.
2) What size and thread does the Watts 0011917 relief valve need?
It takes a 3/4 inch NPT tapping. The inlet is 3/4 inch male NPT and the outlet is 3/4 inch female NPT, so it threads into a 3/4 inch female boss and you run a 3/4 inch discharge pipe out of the side outlet. No adapters needed on a standard 3/4 inch relief port.
3) At what pressure does the Watts 3L 0011917 open, and is the setting adjustable?
It relieves at 150 psi. The pressure range on the 3L series valve is listed as 75 to 150 PSI and this model is factory set at 150 psi, which is also its maximum working pressure. Order the setting you need rather than trying to reset it in the field.
4) Will a 150 psi relief valve protect my water heater if the system runs hot?
The valve is built for water heater service and carries a maximum temperature rating of 210 degrees F, with a steam discharge capacity of 370,000 BTU per hour. That capacity has to equal or exceed the input rating of the heater it protects, so check the nameplate BTU input on your tank before installing.
5) Does the Watts 0011917 come with a test lever?
Yes, it has a manual test lever. That lets maintenance staff lift the poppet periodically to confirm the valve is not seized and that the discharge line is clear, which is the standard annual check on a relief valve in a multi-family or institutional boiler room.
6) Which Watts part number do I order for this 3/4 inch 150 psi relief valve?
The manufacturer part number is 11917, catalogued by Watts as 0011917 in the 3L series. One configuration only: 3/4 inch, 150 psi, poppet type, with test lever.
7) Can I use this relief valve on a boiler or expansion tank instead of a water heater?
It is specified for water heater service, set at 150 psi with a 210 degree F maximum temperature and a 370,000 BTU per hour steam discharge rating. Low pressure heating boilers typically need a much lower relief setting, so a 150 psi valve is the wrong protection for that equipment. Match the relief setting to the vessel's maximum allowable working pressure.
How fast can I get the Watts W11917 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Watts W11917 come with a warranty?
Absolutely. The Watts W11917 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Watts W11917?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Watts W11917 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.