Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: Losing water :(

  1. Back To Top    #1

    Losing water :(

    Hi guys, I have a 25k gallon in-ground pool, two skimmers, sand filter, vinyl liner with fiberglass steps at shallow and fiberglass ladder steps at deep ends. Also an led light. I leave the autocover closed almost all the time.

    Pic of pool so you get an idea.

    I've been losing water since day one (3 years) but think this year is worse. Thus year when I opened in march, I was 4-5 inches below the skimmers and cover had been closed that whole time.

    Example: Tuesday (11 days ago) we got a massive rain. I opened the cover to catch it. Pic attached.

    Day of crazy rain..


    I do not have air bubbles in the window of my basket, but I feel this is more than normal evaporation. Thoughts? Am I crazy?

    25k gallon above ground, vinyl liner, sand filter, furnace, two skimmers, fiberglass steps at shallow and ladder. 8 feet at deep end. Salt system. Des moines, ia.

  2. Back To Top    #2
    Mod Squad zea3's Avatar
    Join Date
    Jul 2009
    Houston, Texas

    Re: Losing water :(

    It is not a suction side leak if you are losing water, so you will not see air in the pump basket unless you have a suction side leak or the water drops too low. Have you checked the multiport valve on the sand filter? Make sure the waste line is not leaking as the pump is running with the valve set to filter. If that is not the problem check the liner for leaks around steps, skimmer, returns, main drain, lights, and seams. You can use food coloring or get leak checking dye to test for leaks.

    About 5 minutes into this video it shows how the dye is sucked into a hole in the liner. Even though it is an above ground pool the info also applies to inground liners. How to use food dye to find a leak in your pool liner - YouTube
    TFP Moderator
    Helpful links: TF Test Kits,TFP Pool School, PoolMath
    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
    Love TFP? Become a
    TFP Supporter!

  3. Back To Top    #3

    Re: Losing water :(

    Thanks, the waste goes into my driveway so it's not there. I'll get a snorkel and start looking for a hole. Great video! Thanks again.


    25k gallon above ground, vinyl liner, sand filter, furnace, two skimmers, fiberglass steps at shallow and ladder. 8 feet at deep end. Salt system. Des moines, ia.

  4. Back To Top    #4

    Join Date
    Jul 2015

    Re: Losing water :(

    Last year I had a very small leak at my skimmer that I located with an extra bottle of phenol red reagent that I had. It was really easy to see the reagent get sucked in where the leak was, some 2 part pool putty (I have a gunite ig) and about 30 minutes later my pool hasn't lost a drop off water due to a leak good luck

    26k (roughly, irregular shape) 10' at deepest diving board and waterslide, IG gunite, 1hp Hayward super pump, 3/4 hp pusher for Polaris280, Hayward s244t sand filter, auto tablet chlorinator, clueless owner.... Knoxville tn, #tf-100 owner#

  5. Back To Top    #5

    In the Industry

    Join Date
    Nov 2011

    Re: Losing water :(

    zea I used to agree with the statement that a suction side leak would present air in the lint pot basket at the pump. I have seen first hand a main drain 90 cracked at the base of the pool wall and never presented air. There was enough force to push water out and not let air in. It took 3 years to finally find the problem.
    Over 30 years in the pool business
    We build vinyl, fiberglass, stainless steel pools
    Certified in Hydraulics

Posting Permissions

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