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Thread: Gunite pool build - leak in spa

  1. Back To Top    #1

    Join Date
    Jul 2012
    Location
    Oklahoma City
    Posts
    72

    Gunite pool build - leak in spa

    We had a good pressure test before gunite. But before filling in perimeter ditches, we pressure tested again and discovered a leak at one of the spa jets. Gunite company is very reputable but unfortunately the nozzle guy must have run into the extending return pipe to hard (6' ID). Looks like a pin hole right above a Tee. But is it the only one?
    PB wants to epoxy the hole, I think it should be cut out and replaced. Also, how should concrete be replaced without having a "cold joint"? Re-shot with gunite?
    Any ideas? Thanks for any advice!!
    Currently

    Rebar/plumbing

    Leak

    Jackhammered




    IG gunite Edmond, OK(OKC), 18x36 freeform ~20K, 4-8' deep, Pentair equip, (2) 3hp VS+ pump, 520 cart filter, 3 LED, Easytouch8, ItellichlorIC40 SWG, Polaris 3900 cleaner, Spa 8'x18"raised, 20' raised bond beam 2 sheers, Stonescape Tahoe Blue quartz plaster, TF-100 kit.
    Feb. 25, 2014 dig started, May 24, 2014 filled.

  2. Back To Top    #2
    JasonLion's Avatar
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    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: Gunite pool build - leak in spa

    Patching with epoxy from the outside will almost certainly fail over time.

    Concrete to concrete bonding is generally fairly easy. You want some rebar rigidly attached to the old concrete, either preexisting or epoxied into holes drilled into the old concrete. The old surface should also be either acid washed or sandblasted. These days it is common to also use a bond coat, which is applied similar to paint right before the new concrete is applied, but that is not essential.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Join Date
    Jul 2012
    Location
    Oklahoma City
    Posts
    72

    Re: Gunite pool build - leak in spa

    Jason, thanks for the info!! The pipe was replaced and we have held 18psi for 2 weeks. My concern now is if the spa is not "shot" how can you get concrete/gunite all the way back in the small voids. Of course PB says no problem but I am worried about the structural integrity 10-20 years from now. I will post current pic.
    IG gunite Edmond, OK(OKC), 18x36 freeform ~20K, 4-8' deep, Pentair equip, (2) 3hp VS+ pump, 520 cart filter, 3 LED, Easytouch8, ItellichlorIC40 SWG, Polaris 3900 cleaner, Spa 8'x18"raised, 20' raised bond beam 2 sheers, Stonescape Tahoe Blue quartz plaster, TF-100 kit.
    Feb. 25, 2014 dig started, May 24, 2014 filled.

  4. Back To Top    #4

    Join Date
    Jul 2012
    Location
    Oklahoma City
    Posts
    72

    Re: Gunite pool build - leak in spa

    Thanks for any suggestions!!
    Current pic

    Close up





    IG gunite Edmond, OK(OKC), 18x36 freeform ~20K, 4-8' deep, Pentair equip, (2) 3hp VS+ pump, 520 cart filter, 3 LED, Easytouch8, ItellichlorIC40 SWG, Polaris 3900 cleaner, Spa 8'x18"raised, 20' raised bond beam 2 sheers, Stonescape Tahoe Blue quartz plaster, TF-100 kit.
    Feb. 25, 2014 dig started, May 24, 2014 filled.

  5. Back To Top    #5

    Join Date
    Aug 2011
    Location
    Southern California
    Posts
    188

    Re: Gunite pool build - leak in spa

    Quote Originally Posted by JasonLion View Post
    Patching with epoxy from the outside will almost certainly fail over time.

    Concrete to concrete bonding is generally fairly easy. You want some rebar rigidly attached to the old concrete, either preexisting or epoxied into holes drilled into the old concrete. The old surface should also be either acid washed or sandblasted. These days it is common to also use a bond coat, which is applied similar to paint right before the new concrete is applied, but that is not essential.
    Any concerns about the rebar not being sealed or for future rebar rust coming through?

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