Watts 174A-3/4-30 Boiler Pressure Relief Valve

The Boiler Pressure Relief Valve from Watts (174A-3/4-30) protects hot water heating boilers by safely releasing excess pressure. This lever-type relief valve combines a bronze body with a stainless steel spring for dependable operation and long-lasting performance.

Designed for 3/4 inch inlet and 3/4 inch outlet with female threaded connections, it fits standard boiler piping. The valve features a set pressure of 30 PSI and a service range of 30–150 PSI, with a temperature rating up to 250°F. Built to ASME, NB, HV, MIL-V-18634B Type I Class 3A Style A standards, it is suitable for residential and commercial hot water boilers.

Capacity ranges from 650,000 to 2,445,000 BTU/hour, making it compatible with a wide range of boiler sizes. Installation highlights include a seat located above drain, a non-metallic disc to metal seat interface, and a test lever for safe, controlled testing.

• Seat Located Above Drain
• Non-Metallic Disc to Metal Seat
• Test Lever
• End Connection: Female Threaded x Female Threaded
• Inlet/Outlet Size: 3/4 inch
• Lever Type Operation