The Hayward SPX0740D Valve Seat Gasket is a specialist component developed for pool and spa multiport valves that provides a tight and leak-free seal. This gasket, which is made of sturdy rubber, keeps water from seeping between ports, preserving the valve's correct operation. In order for the valve to efficiently guide water flow through different filter and backwash settings which a... https://www.usapoolshop.com/spx0740d-hayward-valve-seat-gasket