CCX1000V Cartridge Filter Manual Air Relief Valve For Hayward Pro-Grid DE Filter Features: [ Compatible With ] CCX1000V Air Relief Assembly Applicable to XStream(R) Filtration Series, SwimClear(TM) and HCF7303C HCF Series Cartridge Filters, as well as Pro-Grid(TM) Vertical Grid DE Series Filter. [Premium Materials] It is made of plastic and rubber, with long service life and simple installation. [ Function ] Remove the air from the swimming pool filter and reduce the pressure inside the filter. This air may cause excessive pressure and reduced circulation. [High sealing] .
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