This temperature and pressure relief valve has an MNPT inlet and FNPT outlet that are 3/4 inches each. Its bronze body measures 1 15/32 x 4 5/16 inches, and it has a 1 9/16-inch long thermostat and 2 5/8-inch long shank. The pressure is factory-set at 150 psi, with a maximum temperature of 210 Degrees F and 105,000 BtuH. The valve has a stainless steel spring and is auto-re-seating. It is CSA 4.4 and compliant.