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Thread: DE leaking back into pool from pentair 4000 via wall jets

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    DE leaking back into pool from pentair 4000 via wall jets

    The filters are snug into the manifold. There are no holes in filters.


    Anyone seen de leaking like this?

    I read vague description about valve in backwash, but was not able to comprehend.


    Tnx,
    Manuel
    LA

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: DE leaking back into pool from pentair 4000 via wall jet

    Welcome to TFP!

    There are a number of possibilities. The most likely is a torn grid or improperly put together manifold assembly. It could also be a cracked pipe inside the filter, or something wrong with the multi-port valve, or forgetting to use rinse after backwashing.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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