Temperature and Pressure Relief Valve, Inlet Type MNPT, Outlet Type FNPT, Inlet Size 1 in, Outlet Size 1 in, Thermostat Length 3 in, Body Height 5 5/8 in, 500,000 BtuH BtuH, Factory Set Pressure 125 psi, Max. Temp. 210 Degrees F, Shank Length Standard, Auto Re-Seating Yes, Body Material Bronze, Spring Material Stainless Steel, Body Width 6 1/2 in, Standards ANSI Z21.22, ASME Code HV, CSA