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Thread: Leak detection in a Return Line

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    Leak detection in a Return Line

    Hi -

    I have an 50+ year old pool which for it's age is in good shape except for a leaking return line from the shallow end skimmer. The pool is somewhat unique - kidney shape, painted concrete, copper piping, bronze return jets - so I sometimes need unique fixes.

    How do you find where the leak is along the return line?

    Can it be fixed without digging up the deck and yard?

    If I dig, would a PVC patch work? using rubber gaskets & stainless steel tightening bands?
    Thanks!

    AntiquePool, 50+ years & still going...
    IG 33,000 painted concrete
    1.5HP - 60sqft DE Filter

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    Re: Leak detection in a Return Line

    To test for the leak , plug the skimmer and pressure test from the pump deck. Have a guage installed so you can tell if pressure drops. They make a pvc coupling with a rubber compression seal just for this type of repair. Hopefully you dont have some oddball size.
    coloeb,
    20k gal. IG fiberglass/plaster rectangle 32'x16'
    Hayward Superpump 3/4 H.P. primary Hayward model 5060 Booster Pump
    Hayward Pro Series High Rate Sand Filter
    Pentair Model 320 automatic Chlorine/bromine in-line feeder

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    Re: Leak detection in a Return Line

    Hi -

    I confident that I have a leak based on the following: I'll lose 2 -3 inches of water over night when this skimmer is the only one open - I'll plug the other for test. Plus, when this skimmer is running I'll get air into the system.

    My question is how do you determine where the leak is? The return line could be at least 50ft long. Also, is there anyway to fix the leak by lining the pipe from the inside? much like the do with sewer pipes?
    Thanks!

    AntiquePool, 50+ years & still going...
    IG 33,000 painted concrete
    1.5HP - 60sqft DE Filter

  4. Back To Top    #4

    Join Date
    Nov 2007
    Location
    Austin, TX
    Posts
    69

    Re: Leak detection in a Return Line

    I had a similar issue (with a much newer pool) and ended up using a leak detection service. They used an underwater microphone and were able to locate the leak to within about an inch. It was actually very impressive. If you go that route, be sure to have them check out the entire pool. Multiple leaks are common on older pools. Good luck!
    My Pool
    15k Gal Gunite Pool w/8 ft Spa w/Spillover
    Hayward DE Filter + DE Separation Tank
    Legend Sweep, Pentair Gas Heater
    Stenner Metering Pump for Liquid Chlorine Injection (15 gallon tank)

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