Watts 740-1-30 Boiler Pressure Relief Valve

The Watts 740-1-30 Boiler Pressure Relief Valve is a reliable safety valve designed for hot water heating boilers. This lever-type relief valve protects equipment and occupants by releasing excess pressure within a 30 to 75 PSI range.

Designed for durability, it features a 1" inlet, 1-1/4" outlet, and female threaded connections. Built with an iron body, stainless steel spring, metal seat, and a non-metallic disc, it provides dependable operation under high heat up to 250°F. The valve is sized for capacities from 925,000 to 2,649,000 BTU/hour and complies with ASME NB, HV, MIL-V-18634B standards (Type I, Class 3A, Style B).

Key installation and safety details include a seat located above the drain, test lever for periodic verification, and an expanded outlet for smoother discharge. This valve is ideal for hot water heating boiler systems requiring a robust, lever-type relief valve that meets strict industry standards.

• Inlet size: 1" • Outlet size: 1-1/4" • End connection: Female Threaded x Female Threaded
• Body material: Iron • Spring material: Stainless Steel • Seat material: Metal • Disc material: Non-Metallic
• Set pressure range: 30 PSI (operating 30–75 PSI)
• Temperature rating: 250°F
• Inclusions: Seat Located Above Drain, Test Lever, Expanded Outlet
• Application: Hot Water Heating Boiler
• Standards: ASME NB, HV, MIL-V-18634B Type I, Class 3A, Style B
• Capacity: 925,000–2,649,000 BTU/hr
• Dimensions: 3-1/2" W × 7-1/4" H