This temperature and pressure relief valve has a bronze body and stainless steel spring, with a 4 3/4-inch long thermostat and 6 7/8-inch long shank. The valve body measures 1 1/2 x 6 7/8 inches and has a 3/4-inch FNPT inlet and outlet. The factory-set pressure is 150 psi and maximum temperature is 210 Degrees F with a 205,000 BtuH. The valve is auto-reseating and meets CSA 4.4 standards.