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Thread: DE Filter question

  1. Back To Top    #1

    DE Filter question

    Anyone know what the following is in the image? I thought water was flowing through there now I don't see water. Does this mean my filter is clogged?
    25k Gallon Gunite Inground Pool
    Pentair FNS PLUS DE filter
    Pentair WhisperFlo WF-24 (seems like single speed)
    Chlorine
    Bel Air, MD 21015

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: DE Filter question

    That looks like a check valve. You can't always see the water moving when it is free of bubbles.

    The two best ways to check if your filter is clogged is to feel the force of the return jets, if they are weak then the filter probably is clogged, and to watch the pressure gauge on the filter, when the pressure is high the filter is clogged.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Re: DE Filter question

    ok thanks a lot Jason!
    25k Gallon Gunite Inground Pool
    Pentair FNS PLUS DE filter
    Pentair WhisperFlo WF-24 (seems like single speed)
    Chlorine
    Bel Air, MD 21015

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