Hayward Check Valve for StarClear Cartridge and Perflex DE Filters | ECX4077B1 C4335 The Unicel C-9494 is a

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Hayward Check Valve for StarClear Cartridge and Perflex DE Filters | ECX4077B1 C4335 The Unicel C-9494 is aThe Hayward Check Valve (ECX4077B1) is the OEM replacement check valve for select StarClear cartridge filters and Perflex Extended Cycle DE filters. This check valve is installed within the internal plumbing of the compatible filter tank assembly, maintaining the one way flow path specified by Hayward for these filter models. It is sized and configured specifically for the StarClear and Perflex DE filter housings listed below it is not a universal or