Watts 740-3/4-50 Boiler Pressure Relief Valve

Watts 740-3/4-50 Boiler Pressure Relief Valve is a lever-type relief valve engineered for hot water heating boilers. Featuring a 3/4 in inlet and 1 in outlet with female threaded connections, it delivers reliable overpressure protection right where you need it. The valve is set at 50 PSI with a temperature rating of 250°F and supports a normal operating range from 30 to 75 PSI to suit different boiler setups.

Built for durability, this unit uses an iron body, stainless steel spring, metal seat, and a non-metallic disc for dependable sealing. Notable design details include a seat located above the drain, an expanded outlet, and a test lever for safe and easy verification.

• Type: Lever
• Connections: 3/4 in inlet, 1 in outlet; Female threaded x female threaded
• Materials: Iron body, stainless steel spring, metal seat, non-metallic disc
• Set pressure / temp: 50 PSI; 250°F max; 30–75 PSI operating range
• Key features: Seat located above drain, expanded outlet, test lever
• Application: Hot water heating boiler
• Standards: ASME, NB, HV, MIL-V-18634B Type I Class 3A Style B
• Capacity / dimensions: 925,000–1,886,000 BTU/hour; 3" W x 5-5/8" H