Hayward Manual Air Relief Assembly for SwimClear Cartridge Filters and ProGrid DE Filters | DEX2420MAR2 Parts - Whitegoods / Flow Fittings Using incorrect filter media can

Using incorrect filter media can damage your filtration system

or cross-threading damage — a contaminated port is the most common reason a new cap fails to seal

When the light output on your ColorCascade bubbler dims

Use Metalfree™ as a weekly maintenance to prevent future metal staining

substituting a standard O-ring of the same inside diameter will not produce an adequate seal — the square cross-section is a design-specific requirement of these closure assemblies

Hayward Manual Air Relief Assembly for SwimClear Cartridge Filters and ProGrid DE Filters | DEX2420MAR2 Parts - Whitegoods / Flow Fittings Using incorrect filter media canThe 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.