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Thread: Air in cartridge filter tank

  1. Back To Top    #1

    Join Date
    Jun 2016
    Valley Center, CA

    Air in cartridge filter tank

    I recently installed an IntelliFlo Variable Speed Pump #011018 and new SWG. Have noticed that the filter drains
    over night and I have to bleed it upon startup. I installed new check valve at filter outlet but that did not fix problem.
    I tightened pressure valve where it attaches to top of tank. The filter is the highest item in the system.

    Could the pressure gage assembly itself be leaking? It is about 12 yrs old. Otherwise what could be source of problem.
    Pool Equip.jpg
    Attached Images Attached Images
    IG 30,000 Gal.pebble pool w/Pentair CCP-420 cartridge filter; Hayward SWP15 chlorine generator, IntelliFlo 3HP VarSpeed Pump & solar heating array. Have one waterfall; one top skimmer, two bottom skimmers/drains, three returns and Baracuda MX8 Pool Cleaner. Suction line is 2" w/pool equipment pad 60ft from pool. Filter pressure gauge is 6ft above pool water; solar array is about 20ft from equipment pad and approx. same level as pool.

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Air in cartridge filter tank

    The filter could be leaking anywhere and allowing air in and the water to drain out of it when the pump is off.

    Try to turn the pump off and listen for hissing or gurgling. You could try shaving cream to see if it gets sucked in ... although if it is a slow air leak it can be hard to find. Many times these leaks only let air in and do not let water out when running so they are tricky to locate.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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