Watts 740-1-50 Boiler Pressure Relief Valve

Watts 740-1-50 Boiler Pressure Relief Valve delivers essential protection for hot water heating boilers. This lever-type boiler safety valve helps prevent dangerous overpressure by venting when the set point is exceeded, safeguarding equipment and ensuring safe operation.

Built for durability, the iron body houses a stainless steel spring and metal seat with a non-metallic disc for reliable performance. It features a 1-inch inlet and 1-1/4 inch outlet with female threaded connections, and a seat located above the drain for quick relief and easy testing.

Key specs include a set pressure of 50 PSI, a pressure range of 30–75 PSI, and a temperature rating of 250°F. The valve is ASME NB, HV, MIL-V-18634B Type I Class 3A Style B compliant and suitable for hot water heating boilers with a capacity of 925,000 to 2,649,000 BTU/hour.

• Inlet size: 1 inch; Outlet size: 1-1/4 inch
• end connections: Female threaded x Female threaded
• Body: Iron; Spring: Stainless steel; Seat: Metal; Disc: Non-metallic
• Set pressure: 50 PSI; Pressure rating: 30–75 PSI; Temp rating: 250°F
• Inclusions: Seat located above drain, non-metallic disc to metal seat, test lever, expanded outlet
• Overall dimensions: 3-1/2" W x 7-1/4" H