Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 3 of 3

Thread: A leak, somewhere, need ideas

  1. Back To Top    #1

    In the Industry
    kevreh's Avatar
    Join Date
    Jun 2007
    Location
    Annandale, VA
    Posts
    412

    A leak, somewhere, need ideas

    Hi-

    The better part of last season I was troubleshooting my pool for a leak. Its a concrete inground, with equipment thats been upgraded in the last 5-10 years. I know its a leak because a) water has dropped a lot faster than in the past, I would say about 1" every 2-3 days, and b) I did the bucket test to confirm that water was evaporating faster from the pool.

    Below are the things I've looked at (with my actions in parenthesis). This has been going on for a good part of last summer, and everything below has probably been checked a few times.

    • Above ground plumbing (looked around everywhere for small leaks, these would be obvious)
    • Components on pool pad like pumps, heater, etc... (did a visual)
    • Gap where pool meets plastic overflow body (pretty common for cracks and small leaks to happen here, I applied under water putty, but to be certain I should probably drain pool below the overflows and apply something better).
    • Light body (this is metal, but water could be seeping out where the electric wire comes into body, I applied a type of putty (black, flexible), but its' possible its still leaking)
    • Solar panels (did a visual on the roof)
    • Concrete/plaster (no cracks, pool was re-plastered a few years ago)
    • Underground pvc (this is what worries me the most. I have no idea how to find out if this is the problem. Only idea is to drain pool below outlets, and do an air pressure test. Would air seep out from a cracked underground pipe???)


    That's what I have so far. I really appreciate anyones $.02 on this.


    Kevin
    16x32 Concrete IG 24k Gallons
    Equipment: Carvin 525sf Cartridge Filter, Jandy Gas Heater, Vortex Solar Panels w/solar valve, 1hp Hayward Pump with 3/4 HP AO Smith 2 Speed Replacement Motor, Aquarite Saltwater Cell, Polaris 280 Dolphin Active 20 Robot
    Automation: Hayward Prologic Controller

  2. Back To Top    #2
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    24,974

    Re: A leak, somewhere, need ideas

    That is a very small leak and is going to be hard to track down. 1/8"-1/4" per day is normal evaporation and you aren't much above that. 1/4" of water per day from your pool is about 80 gallons, so that would be a very obvious leak at your equipment pad or solar panels. But, the ground can easily soak up 80 gallons per day and you'll never notice it.

    Seems like you've read this, but to just in case, Pool School - Leak Detection

    The conduit in a light niche is designed to be flooded and should not be sealed up at the niche.

    It is possible to pressurize plumbing, but I'm not sure on details of how.

    One option is to let it leak until it stops and that will point to where the leak is. At the skimmer, returns, etc.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  3. Back To Top    #3

    In the Industry
    kevreh's Avatar
    Join Date
    Jun 2007
    Location
    Annandale, VA
    Posts
    412

    Re: A leak, somewhere, need ideas

    Hey thanks for the feedback pooldv! Just to clarify;
    - I would say its' more than the 1/8-1/4 you mentioned, easily 1/2" a day. Either way, more than just evaporation. Having the pool for 13 years, I have a pretty good grasp on evap rates.
    - For the light niche, I meant the back of it where the power cord comes in. There's a coupler, where the power wire enters the niche, with a little rubber compression thing that can fail. That happened to me because at one point when my pool water was really high (overflowing) after a big storm water was dribbling out of the grounding box. Grounding box sits @8' back from the deep end where the light niche is. You may know this, but that's where the ground is connected to a grounding rod. There's a plastic pvc pipe that leads from the niche to the ground box, which allowed the water to leak. At that time, the ground box was slightly lower the the overflow point of the pool. Either way, what it told me was that water was getting into that pipe. While I've raised the grounding box, its possible the pvc pipe is cracked somewhere.

    I like your idea of just letting it leak until it finds its lowest point. That might help.
    16x32 Concrete IG 24k Gallons
    Equipment: Carvin 525sf Cartridge Filter, Jandy Gas Heater, Vortex Solar Panels w/solar valve, 1hp Hayward Pump with 3/4 HP AO Smith 2 Speed Replacement Motor, Aquarite Saltwater Cell, Polaris 280 Dolphin Active 20 Robot
    Automation: Hayward Prologic Controller

Posting Permissions

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