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Manufacturer Resources
Product Specs
- Body Material:
- Bronze
- Brand Name:
- Watts
- Buy American Act Compliant:
- USA
- Ean:
- 98268010275
- Inlet Connection Size:
- 1/2 IN
- Inlet Connection Type:
- Male Threaded
- Inlet Thread Type:
- NPT
- Lead Free:
- No
- Maximum Temperature Fahrenheit:
- 210
- Maximum Working Pressure Psi:
- 113
- Outlet Connection Size:
- 1/2 IN
- Outlet Connection Type:
- Female Threaded
- Outlet Thread Type:
- NPT
- Part Number:
- 190482
- Pressure Relief Setting Psi:
- 150
- Pressure Steam Discharge Capacity:
- 15,000 BTU per hour
- Protection Type:
- Pressure
- Series:
- 53L
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Valves
- Product Type:
- Relief Valve
Watts 53L-150 1/2 – Frequently Asked Questions
1) What size and thread does the Watts 53L-150 relief valve need on the tank or piping?
The 53L-150 1/2 takes a 1/2 inch male NPT inlet threaded into the vessel or tee, and the outlet is 1/2 inch female NPT so you can run a drain line off it. Both ends are 1/2 inch, so no bushing is needed on standard 1/2 inch NPT piping.
2) At what pressure does the Watts 53L-150 valve open, and what system pressure can it sit on?
It is set to relieve at 150 psi and the valve is rated for a maximum working pressure of 113 psi. Size your system so normal operating pressure stays well under the 150 psi set point, otherwise the valve will weep.
3) Is the Watts 53L-150 a temperature and pressure (T&P) valve for a water heater?
No. The 53L-150 is a pressure-only relief valve, protection type pressure, with no temperature probe. A domestic water heater needs a combination T and P valve. Use the 53L on compressors, boilers, storage tanks, and similar vessels where overpressure is the only concern.
4) Can the Watts 53L-150 be used on potable drinking water lines?
No. The bronze body on the 53L-150 is not lead free, so it should not go on potable water where lead-free plumbing is required by code. Keep it on non-potable service such as heating, compressed air, and process vessels.
5) What is the discharge capacity and temperature limit on the Watts 53L pressure relief valve?
Steam discharge capacity is 15,000 BTU per hour and the maximum operating temperature is 210 degrees F. Match the BTU capacity to the input rating of whatever you are protecting; if the vessel produces more than 15,000 BTU/hr, you need a larger valve.
6) Does the Watts 53L-150 have a test lever for periodic testing?
Yes, it is supplied with a test lever, so maintenance staff can lift and flush the poppet on a routine schedule without breaking the connection. That matters on MRO rounds where relief valves are exercised annually.
7) Is the Watts 53L-150 Buy American compliant for government and institutional jobs?
It is listed as Buy American Act compliant, USA. That is the flag procurement needs for federal, municipal, and many institutional specs.
How fast can I get the Watts 53L-150 1/2 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 53L-150 1/2 come with a warranty?
Absolutely. The Watts 53L-150 1/2 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 53L-150 1/2?
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product
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installation tips, and troubleshooting. Contact Us
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