This money for special electric water heater, electric water heaters are installed in the cold water inlet, mainly have the check and the function of the pressure, prevent the backflow of electric water heater in the hot water back into the cold water , and can increases as the temperature increases the pressure on the electric water heater drain out, to ensure the normal use of the tank, and improve the service life of the tank, avoid bladder rupture. Feature - Color: Silver Red - Material: Brass - Size: 6x4.5x3cm - Working pressure: 0.8mpa - Working medium;Water, gas - Operating temperature: 0&deg;C<= T <=110&deg;C - device: there is device installed in the body, when the pressure of tap water pipeline or electric heating pressure more than the rated pressure of the relief when the relief will automatically drain through drain to discharge too high pressure, in order to ensure that the electric water heater does not explode because of too high pressure. - Check function: install check function at the bottom of the water inlet of the relief valve. The inlet of the relief can’t discharge water. When the tap water in the pipeline is cut off, it can prevent the hot water energy loss caused by the burned back to the pipeline. - Every product is , Angle valve] has a strong technical team to introduce foreign technology. - With sealed gasket, more convenient installation Package list: 1 x safety