Temperature and Pressure Relief Valve, Inlet Type FNPT, Outlet Type FNPT, Inlet Size 1 in, Outlet Size 1 in, Thermostat Length 6 in, Body Height 5 1/2 in, 670,000 BtuH, Factory Set Pressure 150 psi, Max. Temp. 210 Degrees F, Shank Length Standard, Auto Re-Seating Yes, Body Material Bronze, Spring Material Stainless Steel, Body Width 3 in, Standards ASME Rated, CGA Listed, Meet FHA Specifications, Military Spec, MIL-V-13612C, MIL-V-136-12D, Type 1 and ANSI Z21.22 Standard