Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: How to know if a fiberglass pool is leaking?

  1. Back To Top    #1

    Join Date
    Mar 2015
    Location
    South Texas
    Posts
    411

    How to know if a fiberglass pool is leaking?

    Okay, I have what I feel like is somewhat of a stupid but very important question:

    How do you test if a fiberglass shell is cracked and/or leaking?

    3 times my pool builder has attempted to fill and backfill my fiberglass pool and all 3 times we have gotten rained out. Tons of water in pool and tons of water in pool hole. We drain the hole and the level in the pool lowers also. I'm convinced there is a leak or crack in the shell but the pool builder is not so sure. (This has been going on for 2 months, with record rains here in TX--very frustrating!)

    Is there any way to test it? There are no visible cracks that I can see. Could we take the pool out and fill it with dyed water and see if it leaks?

    I'm not sure what the next step is, but I feel like I should not let them proceed as-is
    15,000 gallon free form Viking fiberglass pool. Hayward Star-Clear Plus C12002 cartridge filter. Hayward Swim Pure Plus T-15 SWG. Testing with TF-100 Kit. 2 speed 1.5HP Supreme pump. Dolphin Nautilus robotic cleaner

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: How to know if a fiberglass pool is leaking?

    The easiest way to test the shell is to plug off the suctions and returns and to run a bucket test. Fill a bucket with pool water and sit it in the pool on a step so the level in the bucket is about the same as the level in the pool. Then mark the level in the bucket and in the pool as accurately as possible and let it sit 24 hours (without rain), and measure it again. If you're losing water in both about the same, it's evaporation. If the pool drops more than the bucket there's a leak somewhere. If there's no leak you may want to unplug the returns and suctions and run the test again.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  3. Back To Top    #3

    Join Date
    Mar 2015
    Location
    South Texas
    Posts
    411

    Re: How to know if a fiberglass pool is leaking?

    Thanks for the info Bama Rambler!

    I will definately be performing the bucket test starting today. Makes total sense.

    Just to be clear, however: The only water in the pool at this time is from rain water. There are no suctions or returns cut out yet at all, just a solid pool shell sitting in a hole (they havent' even run plumbing yet)
    15,000 gallon free form Viking fiberglass pool. Hayward Star-Clear Plus C12002 cartridge filter. Hayward Swim Pure Plus T-15 SWG. Testing with TF-100 Kit. 2 speed 1.5HP Supreme pump. Dolphin Nautilus robotic cleaner

  4. Back To Top    #4
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: How to know if a fiberglass pool is leaking?

    That won't matter for the test. At least you know it isn't the plumbing leaking! One less thing to chase down.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •