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Thread: Bumps under vinyl liner?

  1. Back To Top    #1

    Join Date
    Aug 2015
    Boston, MA

    Bumps under vinyl liner?

    Hello all. We have our first pool from a house we bought and I have fixed multiple leaks so far some that were dime size holes in the deep end of the liner. Now on that end near the main drain I am seeing raised hard like nickel size bumps that I am worried any pressure, brushing etc. will cause another hole. Planning on replacing the liner maybe next year. Any idea what this signifies the bumps and could the other punctures that I patched caused that?

    Thanks all.
    IG 15 X 30 Rectangle Vinyl Liner Built 1994
    Hayward DE 3620 Vertical Pro Grid
    AquaCal Heat Pump
    18K gallons

  2. Back To Top    #2
    Casey's Avatar
    Join Date
    Apr 2007
    SW PA

    Re: Bumps under vinyl liner?

    Welcome. The bumps are more than likely small rocks or pebbles that resulted from a poor job on the pool base. They only way to fix it is to remove the liner, remove the base and lay a new base of vermiculite or what not.
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

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