This 4 inch dielectric flange pipe fitting is designed for commercial and residential applications such as the connections of piping of dissimilar metals on a hot water storage tank, water and air conditioners, processing tanks, steam, gas, and water piping to prevent accelerated corrosion and deterioration in the piping system due to galvanic and stray current. It is suitable for water, air, oil, natural gas, propane, gasoline, kerosene, mineral oil, vegetable oil, and alkaline. 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).