This 4 inch dielectric flange pipe fitting is designed for commercial and residential applications to prevent accelerated corrosion and deterioration in the piping system due to galvanic and stray current from connections of dissimilar metals. Ideal in applications such as hot water storage tanks, water and air conditioners, processing tanks, steam, gas, and water piping. It consists of an iron pipe threaded flange tailpieces with a Buna-N gasket and hardware. The maximum temperature is rated up to 180 degrees F (82 degrees C). The maximum pressure is rated at 175 psi (12.1 bar).