Watts Pressure Relief Valve

Buy Watts pressure relief valves worldwide from 3G Electric — ASME Section IV & XIII safety valves, backflow preventers and regulators, 386 items in stock.

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This bronze temperature and pressure relief valve is ASME Section XIII rated. It features MNPTF x FNPTF connections and is used to protect hot-water systems from overpressure and overtemperature conditions.

Watts

Watts 3/4 40XL-5-150/210 FS ASME Section XIII Temperature &

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ASME Section XIII temperature and pressure relief valve with a copper silicon alloy body. Features MNPTF x FNPTF connections. Used to protect equipment from overpressure and excessive heat in industrial systems.

Watts

Watts 1 LF40XL-4-125/210 FS ASME Section XIII Temperature &

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Cast copper silicon alloy water pressure regulator with 1 1/4 in FNPT connections. Low-lead compliant for potable water systems. Used to reduce and stabilize incoming water pressure in commercial and industrial plumbing applications.

Watts

Watts 1-1/4 LF223-HP High Capacity Water Pressure Regulator

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This ASME Section XIII hot water pressure relief valve features a 1-1/2 in FNPTF inlet and 2 in FNPTF outlet, with an iron body. Rated for a maximum operating pressure of 75 psi, it automatically opens to discharge excess pressure, protecting boilers and water heaters in hydronic heating systems.

Watts

Watts 1-1/2 740 075 FS ASME Section XIII Hot Water Pressure Relief Valve

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This bronze-bodied temperature and pressure relief valve is designed for overpressure and overtemperature protection in hot water systems. It features FNPT x FNPT connections and complies with ASME Section XIII standards. The valve automatically opens to relieve excess pressure or temperature, helping to prevent equipment damage.

Watts

Watts F278030 ASME Section XIII Temperature & Pressure Relief Valve

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This combination valve serves as both a pressure relief and regulator for hydronic heating systems. It automatically fills the system with water and relieves excess pressure to maintain safe operating conditions. The iron body construction with FNPT x FNPT connections is factory set at 15 psi.

Watts

Watts 1450F ASME Section IV Combination Pressure Relief & Regulator Valve

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Watts Standard Capacity Water Pressure Regulator

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Watts

Watts 3/4 LFU5B-LP-Z3 Standard Capacity Water Pressure Regulator

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Watts

Watts 1/2 LF263A 50-175 Standard Capacity Water Pressure Regulator

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ASME Section XIII temperature and pressure relief valve with copper silicon alloy body and FNPTF x FNPTF connections. Used to protect water heaters and boilers from overpressure and overtemperature conditions by automatically discharging water when safe limits are exceeded. Suitable for commercial and industrial hot water systems.

Watts

Watts LF140X-9-150/210 FS ASME Section XIII Temperature &

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Frequently asked questions

Common questions about Watts Pressure Relief Valve from 3G Electric.

How do I size a Watts pressure relief valve?

Match the valve's rated relieving capacity to the boiler, heater or system input, then select set pressure at or below the equipment's maximum allowable working pressure. Check ASME code section, inlet size and connection type against your installation before ordering.

What is the difference between ASME Section IV and Section XIII Watts valves?

ASME Section IV valves are for heating boilers and hot water supply systems, while Section XIII covers temperature and pressure relief on hot water heaters and similar equipment. Non-code Watts relief valves suit air, inert gas and liquid circuits where ASME stamping is not required.

Does 3G Electric ship Watts pressure relief valves worldwide?

Yes. 3G Electric supplies Watts pressure relief valves and backflow preventers worldwide from our 386-item catalog, covering ASME safety valves, regulators and dual check assemblies. Share your set pressure, capacity and connection details and we will confirm availability and lead time.