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Thread: Question about air leaks

  1. Back To Top    #1

    Join Date
    Sep 2014
    Location
    Gilbert, AZ
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    32

    Question about air leaks

    I believe I have an air leak in my sand filter, but I'm not sure. Here are the symptoms.

    When the pump first turns on, it takes 15-20s for it to get fully primed and the pump basket completely full(it works fine after that). When the pump shuts off, I can hear water cascading in the filter, and, about 10 seconds later, the top of the pump basket gets filled back up with air down to the level of the incoming pipe. I read that the pump basket should stay full of water after the pump shuts off, is that correct? I replaced the O-Ring on the pump basket lid since it was showing signs of age, but it made no difference in the behavior.

    A secondary symptom is small air bubbles in the returns. If I backwash the system, even briefly, the bubble will go away for a few days, but then start to reappear.

    Tips/suggestions welcome.
    ~10K Gallon IG Plaster Pool built in 1996
    AO Smith SQ1152 1.5HP Pump
    Sta-Rite T-240BP-1 Sand Filter (62 GPM)

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    TFP Guide

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    May 2007
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    New Brunswick Canada
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    Re: Question about air leaks

    Have you checked all unions and ball valves? It could be as simple as a bad o ring allowing air into the system and that in turn lets to water fall to the lowest level.

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    mas985's Avatar
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    May 2007
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    Pleasanton, CA
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    11,486

    Re: Question about air leaks

    Check the multi-port spider gasket.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  4. Back To Top    #4

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    Sep 2014
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    Gilbert, AZ
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    Re: Question about air leaks

    I've having a hard time finding the part number for the spider gasket by itself. It seems to come as part of a 'plug and gasket assembly' (http://www.amazon.com/Pentair-14965-.../dp/B00B178CL0).

    This is for the WC112-148A top-mounted multi-port valve.
    ~10K Gallon IG Plaster Pool built in 1996
    AO Smith SQ1152 1.5HP Pump
    Sta-Rite T-240BP-1 Sand Filter (62 GPM)

  5. Back To Top    #5

    TFP Guide

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    Re: Question about air leaks


  6. Back To Top    #6

    Join Date
    Sep 2014
    Location
    Gilbert, AZ
    Posts
    32

    Re: Question about air leaks

    Thanks. There were so many different spider gaskets, I wasn't sure how to differentiate amongst them all.
    ~10K Gallon IG Plaster Pool built in 1996
    AO Smith SQ1152 1.5HP Pump
    Sta-Rite T-240BP-1 Sand Filter (62 GPM)

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