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, 205,000 BtuH, Factory Set Pressure 150 psi, Max. Temp. 210 Degrees F, Shank Length Extended, Auto Re-Seating Yes, Body Material Lead-Free Brass, Spring Material Steel, Body Width 2 5/8 in, Standards , NSF