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Thread: Leak detection frustration

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    Join Date
    Oct 2015
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    Vancouver, BC
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    Leak detection frustration

    I purchased a home this summer with an in ground pool. I noticed the water level going down during the hot days but figured it was evaporation. Now with the cooler weather (Pacific Northwest) we are no longer using the pool but plan to keep it open for the winter months. I noticed the water level was going down by about 1/2 inch per day so started a leak detection process using the bucket method and blocking the skimmer and return lines to eliminate the piping. I also used the dye method to check all underwater fittings and steps. I have concluded that the leak must be in the vinyl liner. The water level kept going down but has now stabilized about 5inches below the normal level and well below the skimmer. I assumed the leak must be at that level but can not seem to find anything around the water level that would indicate a leak (dye test and tactile). My question is would the water level only drain down to the water table level out side the pool (quite high as I am close to sea level and the rainy Northwest) and could the leak actually be below that level? There is no main drain at the bottom of the pool.

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    duraleigh's Avatar
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    Re: Leak detection frustration

    My question is would the water level only drain down to the water table level out side the pool (quite high as I am close to sea level and the rainy Northwest) and could the leak actually be below that level? There is no main drain at the bottom of the pool.
    That is conceivable but very doubtful. If it does that, there will be no water pressure holding the liner tight to the wall and the liner should be floating.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Mod Squad zea3's Avatar
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    Re: Leak detection frustration

    Check around the steps, light, ladders, returns, anywhere there was an opening in the liner again. Get the dye very close to the openings and go slowly. If you used food coloring to detect the leak try using leak detection dye. It is a little thicker and will not dissipate as quickly as food coloring.
    TFP Moderator
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    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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    Join Date
    Oct 2015
    Location
    Vancouver, BC
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    Re: Leak detection frustration

    Thanks. I will try that. Next step is to get a leak detection pool
    Company in if it doesn't work

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