0274836 WATTS # 174A 3/4 RELIEF VALVE @ 150PSI 174A34150

Inlet Connection Size 3/4" Inlet Connection Type Female Threaded Inlet Thread Type NPT Maximum Working Pressure-PSI 113 PSI Outlet Connection Size 3/4" Outlet Connection Type Female Threaded Outlet Thread Type NPT Pressure Range 30 to 150 PSI Pressure Relief Setting-PSI 150 PSI Series 174A Features - Bronze body for corrosive protection - Non mechanical seat-to-disc alignment will not stick or freeze - Water can't be trapped and sediment can't foul seat - Pressure setting is 30 psi This 3/4 inch boiler pressure relief valve is used in hot water heating and domestic supply boiler applications to protect against excessive pressures on all types of hot water heating supply boiler equipment. It consists of a bronze body construction with NPT threaded female inlet and NPT threaded female outlet (drain) connections, non-metallic disc-to-metal seating, stainless steel spring, and test lever. It resists corrosive water conditions, sticking and freezing, and prevents water and sediment from being trapped in the seat. It is designed for emergency safety relief, not as an operating control. The pressure relief is set at 150 psi (1034.2 kPa) with corresponding high pressure ratings up to 2,445,000 BTU/hr.