Temperature and Pressure Relief Valve, Inlet Type MNPT, Outlet Type FNPT, Inlet Size 3/4 in, Outlet Size 3/4 in, Thermostat Length 4 in, Body Height 3 1/2 in, 100,000 BtuH, Factory Set Pressure 150 psi, Max. Temp. 210 Degrees F, Shank Length Standard, Auto Re-Seating No, Body Material Bronze, Spring Material Stainless Steel, Body Width 1 7/8 in