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Thread: air bubbles from one return?

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    Join Date
    Oct 2015
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    air bubbles from one return?

    I've checked the O ring at the filter pump as well as the water level to make sure the skimmers aren't sucking in air and both look good but I've got air bubbles coming from one of the pool returns. any other ideas on what to check/troubleshoot? I've noticed it at a couple different returns but never seems to happen and more than one at the same time?
    Build started 6/17. 33x23 free-form, IG, sport pool (approx 17k gallons). Plaster. SWG. Pentair CCP520, Pentair IF 3HP VSP (011018). Dolphin robot cleaner TDB

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    Join Date
    Apr 2016
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    TX
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    Re: air bubbles from one return?

    Hi Darin,

    It sounds like you have a very small leak. If you aren't losing a bunch of water, and the air isn't bothering you, I'd probably just leave it until it got worse. As digging up your line might not be worth the effort for a small leak. Do you notice any dampness around your pool equipment or in the yard? Do you have a DE filter? You might double check that the air valve is closed all the way - sometimes gunk can get in there and disrupt the seal.

    Good luck!

    Take care,
    Mo
    Mo - 21K gal, IG plaster, dual Pentair SuperfloXF pumps, 72 sqft DE filter, cartridge filter for the spa, dual Waterco multi-cyclone prefilters, Dual Circupool SWGs, Polaris booster and cleaner, TBD custom controller.

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    Re: air bubbles from one return?

    we just filled the pool back in December for the first time and hadn't really noticed it until recently so maybe it's at the pump O ring. I'll double check to make sure it's nice and tight. we've got a pentair cartridge filter that we haven't messed with since the pool builder wrapped up. I'll double check the valves on it.

    haven't noticed any damp spots around the pad or elsewhere but I'll keep an eye out for it.. I don't notice an abnormal amount of air bubbles in the pump basket but I'm not entirely sure what that may or may not rule out (perhaps not coming from plumbing/suction side but either O ring or air valve at cartridge filter?)
    Build started 6/17. 33x23 free-form, IG, sport pool (approx 17k gallons). Plaster. SWG. Pentair CCP520, Pentair IF 3HP VSP (011018). Dolphin robot cleaner TDB

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    Mod Squad pooldv's Avatar
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    Re: air bubbles from one return?

    SWG cells will put small bubbles into the return closest to the equipment pad. It is totally normal. You can turn off the SWG, or look when it is off, to verify it is the SWG generating the bubbles.
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    Re: air bubbles from one return?

    Quote Originally Posted by pooldv View Post
    SWG cells will put small bubbles into the return closest to the equipment pad. It is totally normal. You can turn off the SWG, or look when it is off, to verify it is the SWG generating the bubbles.
    interesting tidbit. many thanks!
    Build started 6/17. 33x23 free-form, IG, sport pool (approx 17k gallons). Plaster. SWG. Pentair CCP520, Pentair IF 3HP VSP (011018). Dolphin robot cleaner TDB

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