Boiler Pressure Relief Valve, Inlet Type FNPT, Outlet Type FNPT, Inlet Size 1 1/4 in, Outlet Size 1 1/4 in, Body Height 8 3/8 in, 5,370,000 BtuH, Factory Set Pressure 125 psi, Max. Temp. 250 Degrees F, Auto Re-Seating No, Body Material Lead Free Copper Silicon Alloy, Spring Material Stainless Steel, Body Width 4 3/4 in, Standards ASME, MIL-V-18634B