Hayward SPX0715D valve seat gasket replacement parts for multi-port valves and sand filters -- SPX0715D gasket (single)

All plumbing or mechanical connections need to be sealed using a rigid or flexible waterproof barrier. Static and dynamic connections can be made watertight using fibre or rubber washers, O rings or lip seals, all of which need to chosen to match the type of liquid and pressure they are required to contain.