Temperature and Pressure Relief Valve, Inlet Type MNPT, Outlet Type FNPT, Inlet Size 3/4 in, Outlet Size 3/4 in, Thermostat Length 5 in, Body Height 5 5/8 in, 180,000 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 5/8 in