Temperature and Pressure Relief Valve, Inlet Type MNPT, Outlet Type FNPT, Inlet Size 1 in, Outlet Size 1 in, Thermostat Length 4 in, Body Height 6 1/4 in, 500,000 BtuH, Factory Set Pressure 125 psi, Max. Temp. 210 Degrees F, Shank Length Standard, Auto Re-Seating Yes, Body Material Bronze, Spring Material Steel, Body Width 2 3/4 in