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Thread: Some air in pump gasket / return pressure issues

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    mitch08's Avatar
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    Some air in pump gasket / return pressure issues

    Hey all,

    Another year another 10 problems

    This year upon having all equipment connected, there is a small bit of air in the pump gasket. Not a lot.
    But normally there is absolutely none. There are just some small bubbles swirling around.

    Within about an hour of this, the air becomes greater in the gasket. Still nothing substantial. But larger bubbles. At this time, the return pressure is significantly diminished.

    If I backwash or even just 'bump' the filter (set it to backwash just for a second and then back to filter) the air bubbles go back to barely noticable and the return pressure is great for about another hour. Until it happens again.

    The cement / equipment pad is pretty wet all the time. So something over there is leaking, but I cant really see what. I think the multi-valve port has some leaking happening.
    Also whats interesting and I dont think I ever noticed before is, when this is happening, and I turn the filter off, water forces its way out of the pump gasket. Just looks like so much pressure is built up on there that it squeezes its way out. I dont think thats happened in the past. The seal does look good and the o-ring seems in place and ok.

    Any suggestions that I can look for on my own before I call my pool guy to come back?

    Thanks so much in advance
    18x38 Inground Liner (25k gal) Paver surround, multi-speed pump, DE Filter, Raised spill over spa, TF-100

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    Mod Squad tim5055's Avatar
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    Re: Some air in pump gasket / return pressure issues

    You say, "when this is happening, and I turn the filter off, water forces its way out of the pump gasket." - This tells me the pump strainer basket lid is either not installed correctly (cross-threaded) or the "O" Ring is bad. No water should ever come out of this and it should be "sealed". So, with it not being sealed a small amount of air is being allowed in while it runs.

    If you could update your profile to include your location and just a little more information in your signature about your equipment my help.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Mod Squad pooldv's Avatar
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    Re: Some air in pump gasket / return pressure issues

    Please update your signature as shown here.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    mitch08's Avatar
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    Re: Some air in pump gasket / return pressure issues

    Thanks guys. I changed my profile as best I could for now. I can give it more detail when I get back to see pump brands, etc.

    I will double check the lid. But other than so much pressure being built up that water forces its way out when I turn the pump off, it does appear sealed well. I will also replace the o-ring tonight.

    Appreciate it!
    18x38 Inground Liner (25k gal) Paver surround, multi-speed pump, DE Filter, Raised spill over spa, TF-100

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    mitch08's Avatar
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    Re: Some air in pump gasket / return pressure issues

    Unfortunately changing the o-ring did not help. Water still comes out of the pump lid a bit at times when I turn the pump off. I think this hayward pump lid is designed to do this. When its running, the seal seems locked down tight.

    Is there anything else I should be looking for that might be causing a bit of air in... Slowly degrading my return pressure as the day goes on?
    18x38 Inground Liner (25k gal) Paver surround, multi-speed pump, DE Filter, Raised spill over spa, TF-100

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    Mod Squad jblizzle's Avatar
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    Re: Some air in pump gasket / return pressure issues

    My old RS Hayward pump always squirted out water from the lid when the pump shut off. Never sucked any air in though.

    Could try shaving cream on the joints and see if it is sucked in anywhere.
    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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    Hayward Pool's Avatar
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    Re: Some air in pump gasket / return pressure issues

    Need to know the model of the pump so we can help.
    Hayward Pool Tech
    80+ Years of Technologically Advanced Pool Product Manufacturing
    poolside@haywardnet.com

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