Boiler Pressure Relief Valve, Inlet Type FNPT, Outlet Type FNPT, Inlet Size 3/4 in, Outlet Size 3/4 in, Body Height 5 1/8 in, 1,320,000 BtuH, Factory Set Pressure 75 psi, Max. Temp. 250 Degrees F, Auto Re-Seating No, Body Material Lead Free Copper Silicon Alloy, Spring Material Stainless Steel, Body Width 2 1/2 in, Standards ASME, MIL-V-18634B