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Thread: blowing the lid off the skimmer

  1. Back To Top    #1

    Join Date
    May 2009
    Blue Springs, MO

    blowing the lid off the skimmer

    When the pump has been running in filter mode for awhile and I turn the motor off, there is a big rush of water and it gushes back out through the skimmer. Strong enough to pop the lid off. I've been running the filter for about a week now, and it just started doing it today. The filter normally runs at about 10psi and I've been backwashing it when it gets to 20psi or above.

    What should I be looking for?
    IG pool, 20k gallon, vinyl liner, sand filter

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

    Re: blowing the lid off the skimmer

    That means there is air in the filter. You should let the air out of the filter. The next question is how the air got into the filter. Sometimes air gets into the filter when you clean out the pump strainer basket. Or there might be something more serious wrong. Let the air out and see if the problem comes back, or stays fixed.
    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

    In the Industry

    frustratedpoolmom's Avatar
    Join Date
    May 2007
    SWSuburban Chicago, IL

    Re: blowing the lid off the skimmer

    Read this thread - similar scenario:
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    Perfectly Clear Pool Service, Find me on Facebook!

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