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Thread: air in the pipes ??

  1. Back To Top    #1
    cnatra's Avatar
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    Feb 2014
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    Houston TX
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    air in the pipes ??

    so over the last 36hrs I heated up the pool & the spa (in anticipation of a party today) & had the main pump running almost the entire time

    the main pump was at 2500-3000rpm , usually on the low side of that range

    I also had the heater running for probably at least 16hrs

    so after all the kiddos had left & turned the spa off & returned the pump to "pool" mode to just filter for a couple hours
    when I did this I noticed some air bubbles coming out of the return lines & some air "cavitation" noise from the pump so
    I turned everything off & checked the skimmer baskets & main pump basket

    there was nothing too unusual except one of the skimmers was not seated al the way down & a toy was blocking most of the flow
    I removed the tow reseated the basket & cleaned all 3 baskets & fired the pump back up & purged air at the the top of the filter

    It never really eliminated all of the air & I kept getting surges of air through the system so after messing with the pump valves for the 2 skimmers & main pool drain
    I think I've determined that one (A)skimmer is generating a significantly greater amount of suction than the other (B)skimmer & even when I shut skimmer A off & reduce
    the flow from the main drain skimmer B barely seems t0 generate much suction

    so is this normal to have such a significant disparity between the two skimmers ? could skimmer B be clogged ? is there a design flaw ?

    could there some toy or other mystery time that got past the skimmer baskets clogging a pipe ?

    do I need to call the pool builder ? am I overreacting ???


    (we still owe PB the last 10% + a little more $$ because of post build landscaping issues with the neighbors & problems with his his contractor etc. , it's been frustrating trying to wrap this up ;
    I hate to open a can of worms if we're knee-jerking about this)

    23k gunite, Stonescapes Mini Aqua Blue w/seashell, Pentair CCP520 cartridge filter, 2 Pentair Intelli-Flo VS pumps, Pentair Mastertemp 400, Pentair EasyTouch 8+wireless controller, Silencer spa blower, 3 Intellibrite LEDs, Pentair Racer cleaner, Pentair 320 chlorinator
    my build http://www.troublefreepool.com/threa...-north-Houston

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    mas985's Avatar
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    May 2007
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    Pleasanton, CA
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    Re: air in the pipes ??

    so is this normal to have such a significant disparity between the two skimmers ? could skimmer B be clogged ? is there a design flaw ?
    It depends. If one skimmer has a lot more pipe and/or fittings it could have much more head loss. But what is the filter pressure for each skimmer and the main drain solo and all three on?
    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

  3. Back To Top    #3
    cnatra's Avatar
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    Feb 2014
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    Houston TX
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    Re: air in the pipes ??

    Quote Originally Posted by mas985 View Post
    It depends. If one skimmer has a lot more pipe and/or fittings it could have much more head loss. But what is the filter pressure for each skimmer and the main drain solo and all three on?
    I know at start up with all 3 returns it was just under 20psi at around 2800rpm

    I should have time to check each return tomorrow .....
    23k gunite, Stonescapes Mini Aqua Blue w/seashell, Pentair CCP520 cartridge filter, 2 Pentair Intelli-Flo VS pumps, Pentair Mastertemp 400, Pentair EasyTouch 8+wireless controller, Silencer spa blower, 3 Intellibrite LEDs, Pentair Racer cleaner, Pentair 320 chlorinator
    my build http://www.troublefreepool.com/threa...-north-Houston

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    duraleigh's Avatar
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    Apr 2007
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    Sebring, Florida
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    30,084

    Re: air in the pipes ??

    With the pump running, are you sucking in air in the skimmers......your water could be too low.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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