This temperature and relief valve has a 150 psi factory-set pressure with a maximum temperature of 210 Degrees F and 750,000 BtuH. Its shank length is 5 7/8 inches, thermostat length is 4 3/4 inches, and its bronze body measures 1 3/4 x 5 7/8 inches. It has an FNPT-type inlet and outlet, with a 1-inch inlet and 3/4-inch outlet. It has a stainless steel spring and is auto-re-seating. This valve meets CSA 4.4 standards.