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Thread: Bubbles/Air in system

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    Bubbles/Air in system

    I've searched around the forum and found a few threads around this but nothing very specific. When I turn my pump on, everything seems to be working fine for a few minutes. Then it slowly starts to develop air in the pump basket and small bubbles start coming out of the return side (just one return). Also, the return pressure is pretty low. If there's air coming in on the suction side, that means it should be somewhere above ground, correct? Otherwise I would think I'm just losing water but that doesn't seem to be a problem. Any help is appreciated.

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    Texas Splash's Avatar
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    Re: Bubbles/Air in system

    Hello Edd. Just in case you haven't already seen it, here's the page on suction leaks: Pool School - Suction Side Air Leaks.

    The majority of suction leaks are indeed above ground. Every once in a while though, plumbing is compromised underground, and air can find its way through it. But again, it's not the norm. Remember also, with a suction leak, you are not expected to lose water like you would with a pressure side leak. Hope this helps.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    Re: Bubbles/Air in system

    I must have missed that page. Thanks a lot.

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    Re: Bubbles/Air in system

    I may have found the leak...hopefully. A little water spits out of the inlet to the pump basket when the pump is turned on/off. Also, the outlet pipe above the pump seems to be leaking water too. Will that cause the bubbles?
    30,000 gallon IG
    Pentair FNS Plus DE Filter
    Single-Speed Pump (don't know make)
    Aqua Rite Controller w/Turbo Cell

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    Pool Tool's Avatar
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    Re: Bubbles/Air in system

    Any leak on the suction side of the pump can cause air bubbles in the basket. And yes, sometimes these leaks can be found when the system is shut off and water spurts out of them, generally just for a second or less. For the pipe above the pump, this would probably only leak while the pump is on or allow air into the piping with the pump off. The latter would usually be noticed by air coming out of the returns upon startup.

    You can try the hose trick over the pump basket inlet leak and see if the air bubbles in the basket go away while running water over it, but if you saw water coming out when you turn the pump off that is likely your air source.
    16' x 32' (21100 gal), vinyl, 1.5 hp Hayward SuperPump,
    Tagelus TA60/60D Sand Filter, Raypak 399K Digital Heater, TF-100

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    Mar 2015
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    Re: Bubbles/Air in system

    I believe I've found the leak in both the inlet pipe junction and the seal on the pump basket. The pump basket seems like a pretty straight-forward repair in replacing the gasket. On the inlet pipe, is there a way to repair this without replacing the pipe?
    30,000 gallon IG
    Pentair FNS Plus DE Filter
    Single-Speed Pump (don't know make)
    Aqua Rite Controller w/Turbo Cell

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