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Thread: AIR BUBBLES PULSATING OUT OF RETURN JETS

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    cancuntom's Avatar
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    Mar 2009
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    Cancun, Mexico
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    AIR BUBBLES PULSATING OUT OF RETURN JETS

    I am a retired American living in Cancun, Mexico where I built this pool which was finished late last June. ('08)
    About a week ago the piping immediately coming out of my pump blew out! The PB's plumber had not screwed the connection all the way down into the pump housing and therefore after about 9 months it wiggled it's way free of the housing and erupted in a torrent of water washing down the walls and ceiling of my pump house. I think he backed it out to align the centerlines of the piping going into the main control valve. I rebuilt the piping (pvc) to make sure it was done correctly this time (read....no leaks or loose ftgs). When starting the system after the repairs I began to get air bubbles pulsing out of the return jets. This doesn't happen immediately. They start appear 30 min. after starting the system. I cannot find any above ground leaks, I disassembled the control valve and it appears to be in good order. The "O" rings in it as well as the clear cover on the pump are in good shape. This pool is less than one year old and is well maintained. I have no loss of pool water. I have two skimmers, two bottom drains, and two vacuum ports. The pool has 8 return jets that are evenly spaced from about 5 o'clock thru 1 o'clock. It doesn't matter which mode I have the valves set to. They can be set to skimmers+bottom drains, skimmers only, bottom's only, or vacuum ports only, and the bubbles continue. I've bleed air off the top of the sand filter and even rebuilt the piping a second time to be sure I did it right. I'm not able to solve this problem myself and the only help here in Cancun is self taught laborers and we have a language barrier because my Spanish is poor at this time. Every thing on this pool is manually controlled. I think that the sudden piping failure somehow has caused this, but cannot figure it out. Any suggestions or advice would be much appreciated. I've read all the treads previously posted and have checked everything they did to no avail. See the pix below.

    Overall view of system:


    Piping manifold w/valves:


    Opposite View:
    cancunTom
    Pool size: 14,300 gals. in-ground
    Filter: Aster99 Sand
    Flow: 22m3/h
    Construction: concrete block/Stucco/Glass mosaic tile
    Pump: 2hp, 3450rpm, 220V
    Heater: RayPak P-R206AE
    Check out our Mexican Adventures on my Caribbean Webpage & leave a comment! http://www.cancunTom.com

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    spishex's Avatar
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    Re: AIR BUBBLES PULSATING OUT OF RETURN JETS

    Hey Tom,

    You've most likely got a suction side leak. If the male adapter on the outlet was installed poorly, the suction side adapter would be a good place to start. Other easy culprits to check include the lid gasket, strainer drain plug (the one under the inlet pipe), and the union that you will have to disconnect to remove / reattach the suction side adapter. Try retaping/doping/lubricating those fittings and see if the problem persists.

    Tim

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    spishex's Avatar
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    Re: AIR BUBBLES PULSATING OUT OF RETURN JETS

    Just took a look at your blog. Beautiful place!

    You'll find lots of help here on your solar installation if you haven't already posted about it. I'd just add that it might be helpful for your air problems if you discharged the water below the water line rather than letting it fly through the air. It would also prevent the water from cooling down in the air as it passed from the pipe to the water.

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    cancuntom's Avatar
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    Mar 2009
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    Cancun, Mexico
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    Re: AIR BUBBLES PULSATING OUT OF RETURN JETS

    Spishex,
    Thanks for the advice. You were right on the money. The leak was where the suction pipe adapter was screwed into the pump inlet. For some reason I had checked everything else and missed it. I believe that when the discharge pipe blew it moved the whole pump and caused this connection to fail. I replaced it and used a Permatex pipe sealer on its threads. That solved the issue.....no more bubbles in my jets.
    Thanks for visiting my web blog, if you go far enough back you can find the entire pool build complete with pictures. They build them a bit different here because the ground is all limestone. The back hoe guy worked the pneumatic hammer for 6 days straight from 7am to 5pm to make the whole in the rock for the pool. My neighbors as well as my family endured this without complaint which to me was amazing. It says a lot about Mexican patience and tolerance of others.
    Here are the links to the start of the pool build:
    http://cancuntom.multiply.com/journal/i ... ...........
    http://cancuntom.multiply.com/journal/item/5
    http://cancuntom.multiply.com/journal/item/6
    http://cancuntom.multiply.com/journal/item/7
    http://cancuntom.multiply.com/journal/item/8
    http://cancuntom.multiply.com/journal/item/9

    I also appreciate the suggestions re: the homemade solar pool water heating system. It's a experiment in progress, hopefully preparing us for next year. We never would have guessed that we would not be able to use our pool for 4 months in a sub-tropical climate. Now we know!
    cancunTom
    Pool size: 14,300 gals. in-ground
    Filter: Aster99 Sand
    Flow: 22m3/h
    Construction: concrete block/Stucco/Glass mosaic tile
    Pump: 2hp, 3450rpm, 220V
    Heater: RayPak P-R206AE
    Check out our Mexican Adventures on my Caribbean Webpage & leave a comment! http://www.cancunTom.com

  5. Back To Top    #5
    spishex's Avatar
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    Oct 2008
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    Re: AIR BUBBLES PULSATING OUT OF RETURN JETS

    Very nice! Glad the air leak is resolved.

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