Photo 1 of DEX2420MAR2 Manual Air Relief Assembly, 2420MAR2 Air Relief Valve, Compatible with DE and Cartridge Pool Filter, Fits ProGrid DE, SwimClear, SwimClear Cartridge, and DEP Filter Models such as DE4820

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Photo 1 of DEX2420MAR2 Manual Air Relief Assembly, 2420MAR2 Air Relief Valve, Compatible with DE and Cartridge Pool Filter, Fits ProGrid DE, SwimClear, SwimClear Cartridge, and DEP Filter Models such as DE4820Photo 2 of DEX2420MAR2 Manual Air Relief Assembly, 2420MAR2 Air Relief Valve, Compatible with DE and Cartridge Pool Filter, Fits ProGrid DE, SwimClear, SwimClear Cartridge, and DEP Filter Models such as DE4820