Pentair 272409 Spider Washer Gasket for Pool and Spa Multiport 2-inch Valves -- 272409 Spider Washer

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.