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Thread: Tip For Lowering an In Ground Pool

  1. Back To Top    #1

    Join Date
    Oct 2007
    Philadelphia, PA

    Tip For Lowering an In Ground Pool

    My pool has no main drain. This makes pumping out the pool to lower the water for the winter a problem.

    I tried using a vacuum head connected to the skimmer, but there was enough air leak around the hose in the skimmer that the pump started sucking air when the water level dropped below the skimmer. So, I bought a small submersible pump to lower the water level for the winter. The pump is slow -- it takes about six hours to lower the water level to 18" below the coping.

    This year a came up with a faster way. With the pool full, I hooked up the vacuum head and switched the multiport valve to "Waste" as I've done in past years. I also put the submersible pump in the shallow end, placed the end of the hose from the submersible pump in the skimmer, and turned on the submersible pump. I then turned on the main pump.

    The submersible pump kept enough water into the skimmer to keep air from getting into the hose connected to the main pump. By using the main pump, I was able to drop the pool level in about an hour. After I saw all was working well, I did a final vacuuming before closing the pool while doing the pump down.
    11x27 in ground, vinyl pool
    ~12,500 gal
    PAC FAB (Pentair) Pinnacle 3/4 hp pump
    Pentair 24 sq ft DE filter
    One skimmer, one return (no main drain)

  2. Back To Top    #2
    Mod Squad woodyp's Avatar
    Join Date
    Apr 2010
    East Texas

    Re: Tip For Lowering an In Ground Pool

    Great idea!. Glad it worked for you.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

  3. Back To Top    #3

    Join Date
    Jun 2007
    New Jersey

    Re: Tip For Lowering an In Ground Pool

    A hose into the skimmer also works--sometimes it's easier. It does waste a little water.
    Current: 28,000G 18'x36' I/G AnthonySylvan Plaster; Waterway 60 sq.ft. DE Filter; 1.0hp x 1.65 SF Two-Speed (B2982) WhisperFlo; 2004-Present
    Previous: 40,000G 20'x40' I/G Koven unlined WWII salvage 5/8" marine steel; Lomart Stainless Sand Filter; 3/4hp Hayward SuperPump; 1946-2003 (managed by me from about 1964)
    Ancient Taylor K-2000, upgraded with Taylor CH, TA, and FAS-DPD, and TFT CYA tests.

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