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Thread: Is this cap before pump causing air leak?

  1. Back To Top    #1

    Join Date
    May 2015
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    Tempe/Az
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    12

    Is this cap before pump causing air leak?

    Hey, moved in 2 weeks ago and this is my first pool, so this is my first post!

    When I turn the valve in front of the pump towards the cleaner the pump sucks a lot of air. When it's split between the cleaner/skimmer I get the odd bubble in the top of the pump filter and a few out the returns. I tried submerging the cleaner robots hose but that didnt stop it sucking air.


    When it's sucking air there is a knocking from the pipe connecting to this cap, even when its only pulling a small amount of air.



    I took the pump cover off to let the pressure out and tried unscrewing the cap. It gave a little but I didn't want to force it.

    Could this be the source of the air leak? What is it for?
    Am I ok to unscrew it and inspect it further?

    Thanks!
    19k IG Pebble Tec, SWG Hayward Aqua Rite, Pentair Triton II Sand Filter, 3HP EVSS3-NS Motor, Tempe AZ

  2. Back To Top    #2

    Join Date
    May 2015
    Location
    Tempe/Az
    Posts
    12

    Re: Is this cap before pump causing air leak?

    Another thought - when I divert it could it be increasing the pressure enough to suck air through the o-ring on the pump cap?

    I gave it a good clean and it looked in ok condition.
    19k IG Pebble Tec, SWG Hayward Aqua Rite, Pentair Triton II Sand Filter, 3HP EVSS3-NS Motor, Tempe AZ

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
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    May 2010
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    Tucson, AZ
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    37,389

    Re: Is this cap before pump causing air leak?

    I think that is a check valve, but no idea why there would be one on a cleaner line.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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