Hayward Genuine OEM Diaphragm Gasket (EC-50C, EC-40C), ECX5000G

The Hayward ECX5000G is the genuine diaphragm gasket for the Perflex EC-50C and EC-40C DE filters. It is molded rubber and it is the factory part, not an aftermarket copy.

Why gaskets fail

Rubber in a filter lives between heat, chlorine and pressure cycles. Over time it hardens, takes a permanent set in the shape of the groove it sits in, and eventually splits. None of that shows until the filter is opened, which is why a gasket at this joint is usually replaced on sight rather than inspected and reused.

Worth doing once

Opening a Perflex to this depth is most of the job. The gasket itself costs very little against the time involved, so fitting a new one while the filter is already apart avoids doing the same work again a season later.