This temperature and pressure relief valve has a factory-set pressure of 150 psi and a maximum temperature of 210 Degrees F with 500,000 BtuH. Its thermostat length is 4 3/4 inches, shank length is 6 7/8 inches, and the body measures 1 9/16 x 6 7/8 inches. The inlet and outlet is FNPT with a one-inch inlet and 3/4-inch outlet. The valve is auto re-seating and includes a stainless steel spring. It meets CSA 4.4 standards.