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Thread: Mystery Overnight Pool Drain!

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    Mystery Overnight Pool Drain!

    I just went down to the pool to dip some leaves out and lo and behold the water has mysteriously dropped 6" over night! I looked around everywhere and saw only minor dampness, no great puddles! Then I dropped some food coloring around most of the fixtures I could get too, and found no great suck. Any thoughts? This is a real mystery!
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    In the Industry
    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Mystery Overnight Pool Drain!

    Do you have a multiport valve? Is it set on "filter"?
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    UnderWaterVanya's Avatar
    Join Date
    Jun 2012
    Mint Hill, NC

    Re: Mystery Overnight Pool Drain!

    Do you have a hard plumbed backwash line where water can be drained without seeing water around the pool.

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    Inlaws Pool Boy since June 14th 2012, Pool built ~ 2003, In-Ground, 16'x32'
    13500 gal, Vinyl Liner, Fiberglass Slide, TF-100 Test Kit, Hayward 210T
    sand filter, A.O. Smith 1.5HP main pump motor (C48L2N134C1),
    Hayward SuperPump (model ?), Polaris 380 & PB4 Booster Pump

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