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Thread: air in the return lines

  1. Back To Top    #1

    air in the return lines

    i`m in southern mexico and have sand fliter and concrete pool 15 meters x5 meters x1.5 deep.about 29,000 has 8 returns 1 at each end and 3 on each side.i`m getting air at 1 of the end returns as well as the the first one on each side.i tried opening all the connections and checked all the o rings even replaced the o rings on the filter head and waste basket.i can`t find silicone grease here to seal the i`m just wondering what it could be.the further away from the filter the less air in the returns.thanks for any help
    American Leak Detection
    Tech I, II, CPO
    VP, Sr Tech
    Since 1994

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: air in the return lines

    Air in the returns indicates a leak somewhere in the suction side plumbing. The most common causes are the kinds of things you have already checked, such as a loose pump strainer basket lid. Another simple possibility is the water level being too low in the skimmer, allowing air to be drawn down into the skimmer. If neither of those are occurring, you need to search more widely for a suction side plumbing leak.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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