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Thread: Bubbles from returns

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    Bubbles from returns

    Is it normal to have bubbles constantly coming out of the returns while the pump is running?
    20K inground gunite w/ Aqua Logic automation and chlorination Sta-Rite 400 K natural gas heater and cartridge filter 2 HP pump 1.5 HP spa bubbler for spillover spa 1 HP dedicated Letro Legend cleaner
    H2O: two parts Heart and one part Obsession. ~Author Unknown

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    Mod Squad JohnT's Avatar
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    No it's not. It indicates and air leak between the pool and the pump. Often it's just a loose pump basket lid.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Quote Originally Posted by JohnT
    No it's not. It indicates and air leak between the pool and the pump. Often it's just a loose pump basket lid.
    John is right on the money. I had a similar situation last year. It drove me nuts till I discovered there was a small piece of debris that was stuck to the O-ring of the pump basket which allowed just enought air seepage to create the bubbles from the returns.
    20x40 30,000 gal IG Liner, Pentair II Sand

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    JasonLion's Avatar
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    Note that a SWG will produce very small difficult to see bubbles when it is running. Other than that there shouldn't be any bubbles in the returns.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    I see the bubbles primarily when they surface. I reduced my chlorine setting on the SWG from 40 to 30% today and checked on the bubbles off and on. Interestingly, sometimes they are there, and other times later they are not. Is there any way to know when the SWG is generating by looking at the aquapod display?
    20K inground gunite w/ Aqua Logic automation and chlorination Sta-Rite 400 K natural gas heater and cartridge filter 2 HP pump 1.5 HP spa bubbler for spillover spa 1 HP dedicated Letro Legend cleaner
    H2O: two parts Heart and one part Obsession. ~Author Unknown

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    In the Industry

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    Great advice so far!

    It usually is an air lead on the suction
    side of the pump.

    It could be anywhere from the hose
    on your automatic pool cleaner right
    through to the pump.

    Take Care,

    Michael Silvester

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