The Hayward ECX1003 Diaphragm Gasket is an essential component for use in Diatomaceous Earth (DE) filter systems. This gasket, made of tough rubber, provides a dependable and secure seal within the filter system, avoiding leaks and ensuring optimal performance. The diaphragm gasket works by forming a tight seal between the various sections of the DE filter, including the filter tank a... https://www.usapoolshop.com/ecx1003-hayward-diaphragm-gasket