3/4 inch temperature & pressure relief valve, with long shank THERMOSTAT, for water heaters up to 2 inch thick tank & 105,000 btu, provides fully automatic temperature & pressure relief protection for hot water storage tanks & heaters with 2 inch thick walls & up to 105, 000 btu/hour, comes with test lever & extension THERMOSTAT for installation in the hot water outlet line or directly in the tank TAPPING, temperature sensing element must be immersed in the water within the top 6 inch of the tank. 3/4 inch male inlet & 3/4 inch female outlet, temperature relief 210 degrees Fahrenheit & 150 psi pressure, wetted surface of this product contacted by consumable water contains less than 1/4 of 1 percent, 0.25%, of lead by WEIGHT, same rated, ca listed. The product is manufactured in china. Easy installation and easy handling.