Backflow Prevention: Cepex by Hayward Wafer Check Valves prevent reversal of flow in piping systems. They are ideal where backflow could potentially cause damage to pumps, filters, or process equipment. Automatic Operation: The valves operate without the need for any adjustments or settings. Line pressure moves the solid plastic flap off the elastomer seat, opening the valve. When the inlet flow stops, back pressure moves the flap back onto the seat, stopping the flow. Low Pressure Drop Design: Cepex by Hayward Wafer Check Valves have been designed to provide excellent flow characteristics. Because of there Straight Thru Flow Design they have a lower pressure drop then other check valve designs. And their compact size takes up less space in the pipeline than other type check valve do. No Corrosion Failures: Because of their all plastic construction, these valves will never jam or stick as a result of rust or corrosion. Also they will not contaminate sensitive fluids that come into contact with them. Cost Effective Design: Cepex by Hayward Wafer Check Valves are the valves of choice for cost sensitive applications the require a full featured, no compromise valve.