Hayward Manual Air Relief Assembly for SwimClear Cartridge Filters and ProGrid DE Filters | DEX2420MAR2 Parts - Whitegoods / Flow Fittings The Diaphragm opens and closes

The Diaphragm opens and closes causing the G3 cleaner to hop up and down on the bottom of the pool

0 HP models — do not install in 1

Using incorrect filter media can damage your filtration system

Works for up to 30 days or longer depending on metal level

Hayward Manual Air Relief Assembly for SwimClear Cartridge Filters and ProGrid DE Filters | DEX2420MAR2 Parts - Whitegoods / Flow Fittings The Diaphragm opens and closesThe Hayward Manual Air Relief Assembly (DEX2420MAR2) is the OEM replacement air relief valve assembly for Hayward SwimClear Multi Element Cartridge Filters and ProGrid DE Filters. This assembly allows trapped air to be manually purged from the filter tank before start up and during routine maintenance. Releasing air from the tank ensures the filter operates at correct pressure and prevents air locks that can affect flow and filtration performance.