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Manufacturer Resources
Product Specs
- Body Material:
- Brass
- Ean:
- 98268001402
- Gds Status:
- Registered
- Inlet Connection Size:
- 3/4 IN
- Inlet Connection Type:
- Male Threaded
- Inlet Thread Type:
- NPT
- Lead Free:
- No
- Maximum Temperature Fahrenheit:
- 210
- Maximum Working Pressure Psi:
- 56
- Outlet Connection Size:
- 3/4 IN
- Outlet Connection Type:
- Female Threaded
- Outlet Thread Type:
- NPT
- Part Number:
- 11086
- Pressure Range:
- 75 to 150 PSI
- Pressure Relief Setting Psi:
- 75
- Pressure Steam Discharge Capacity:
- 200,000 BTU per hour
- Protection Type:
- Pressure
- Series:
- 3L
- Temperature Relief Fahrenheit:
- 9999
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Valves
- Product Type:
- Relief Valve
- Brand Name:
- Watts
Watts 3L-075 3/4 – Frequently Asked Questions
1) What pressure does the Watts 3L-075 relief valve open at?
The Watts 3L-075 is factory set to relieve at 75 psi. It is a pressure-only relief valve, so it responds to system pressure and not to temperature. If your boiler or tank is tagged for a higher relief setting, the 3L series covers 75 through 150 psi, so pick the model matching the setting stamped on the appliance rather than reusing this one.
2) What size and type of threads does the Watts 3L-075 relief valve have on the inlet and outlet?
Inlet is 3/4 inch male NPT and outlet is 3/4 inch female NPT. That means it threads straight into a 3/4 inch female tapping on the boiler or tank, and your discharge piping screws into the outlet. No adapters needed if you are running 3/4 inch NPT drain piping.
3) Can I use the Watts 3L-075 on a potable water heater?
No. The 3L-075 is not lead free, so it should not go on potable water lines where lead free construction is required. It is a pressure-only relief valve for closed hydronic and steam heating service. For a domestic hot water heater you need a T and P relief valve, which relieves on temperature as well as pressure, in a lead free body.
4) What is the discharge capacity of the Watts 3L-075 relief valve, and will it protect my boiler?
Rated at 200,000 BTU per hour of steam discharge. Size by the input rating of the appliance: the valve's capacity has to equal or exceed the boiler's gross input, so a boiler above 200,000 BTU/hr needs a larger valve or a second one.
5) What temperature can the Watts 3L brass relief valve handle?
Maximum service temperature is 210 degrees F. The body is brass with a poppet type seat and a manual test lever for periodic exercising. Keep it inside that 210 degree limit; it is a relief device, not a high temperature steam safety valve.
6) Do I need anything else to install the Watts 3L-075 relief valve?
The valve itself is the complete device; you supply the discharge piping. Run full size 3/4 inch NPT off the female outlet, pitched to drain and terminated per local code, with no valve or reducer in the discharge line. Thread sealant on the 3/4 inch male inlet, and leave the test lever accessible so it can be exercised.
How fast can I get the Watts 3L-075 3/4 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 3L-075 3/4 come with a warranty?
Absolutely. The Watts 3L-075 3/4 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 3L-075 3/4?
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