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, 105,000 BtuH, Factory Set Pressure 150 psi, Max. Temp. 210 Degrees F, Shank Length Standard, Auto Re-Seating Yes, Body Material Bronze, Spring Material Steel, Body Width 1 7/8 in, Standards Listed by CSA to the Requirements of ANSI Z21.22, and by the National Board to the Requirements of ASME Section IV