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Thread: Skimmer suction

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    Skimmer suction

    We have two skimmers in our pool; one in the shallow end and one in the deep on opposite sides of the pool.

    This morning I went to vacuum and there was little to no suction from the deep end skimmer. Is that normal? If not, what is the first step to diagnose/fix?

    Pardon typos; sheep have hooves, not hands.
    29,000?gal in-ground concrete rectangular
    Pump: Hayward SP2610x15 Filter: Hayward S-244T (Sand) Chlorinator: Hayward CL-200
    2 skimmers; plugged main drain (reason unknown)
    New pool owner! Hooray! /sarcasm

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    Mod Squad jblizzle's Avatar
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    Re: Skimmer suction

    Impossible to say ... depends how your plumbing is setup.

    How many suction lines do you have in front of the pump?
    I see you only have the 2 skimmers and no floor drain, right?
    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
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  3. Back To Top    #3

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    Re: Skimmer suction

    If we DO have a main drain, it doesn't work and I can't see it. . But I don't think we have one.

    Looks like there are two pipes that form a Y junction then go into the pump.

    I tried sticking my hand in the suction hole of the skimmer (our other one had started to jam up with those helicopter things) to no avail. What's next?

    Pardon typos; sheep have hooves, not hands.
    29,000?gal in-ground concrete rectangular
    Pump: Hayward SP2610x15 Filter: Hayward S-244T (Sand) Chlorinator: Hayward CL-200
    2 skimmers; plugged main drain (reason unknown)
    New pool owner! Hooray! /sarcasm

  4. Back To Top    #4
    Texas Splash's Avatar
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    Re: Skimmer suction

    We had another reader recently who had slow/plugged water flow from the skimmer to the pump. Turned-out she had an obstruction (frog or something) that got it there. She eventually got it out. Is there any chance that something got past your skimmer basket? Also, have you vacuumed lately and used that skimmer for your vacuum hose? That's a prime time for someone to suck-up something rather large that can get stuck in the pipe effecting the water flow. Just a thought anyways.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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  5. Back To Top    #5

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    Re: Skimmer suction

    Definitely could have been. I tried using that skimmer to vacuum and at first it had low suction but then it had none.

    So where do I check next? I'd prefer to avoid dismantling the whole pool.

    Pardon typos; sheep have hooves, not hands.
    29,000?gal in-ground concrete rectangular
    Pump: Hayward SP2610x15 Filter: Hayward S-244T (Sand) Chlorinator: Hayward CL-200
    2 skimmers; plugged main drain (reason unknown)
    New pool owner! Hooray! /sarcasm

  6. Back To Top    #6
    Mod Squad jblizzle's Avatar
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    Re: Skimmer suction

    Add pictures of your pluming setup.

    You need to try to understand how the pool is plumbed in order to troubleshoot.
    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
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  7. Back To Top    #7

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    Re: Skimmer suction

    Ok. Not sure if this is overload, but here it is. Note that heater is not part of the plumbing and apparently does not work.



    Pardon typos; sheep have hooves, not hands.
    29,000?gal in-ground concrete rectangular
    Pump: Hayward SP2610x15 Filter: Hayward S-244T (Sand) Chlorinator: Hayward CL-200
    2 skimmers; plugged main drain (reason unknown)
    New pool owner! Hooray! /sarcasm

  8. Back To Top    #8

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    Okemos MI
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    Re: Skimmer suction

    Okay. So I discovered that the skimmer without suction was the one on the left, without the easy turn handle. I got a wrench out and lo and behold! The skimmer valve was closed.

    So I opened it up and started running the pump. Checked the skimmer and noticed two things.

    1. Skimmer kept filling to a certain point, then draining all of a sudden, then filling again.

    2. When I felt around, I felt suction from the hole closest to the pool, not from the one further away.

    Ideas? Without a main drain, I have no idea where that front hole might go. How do I find out?

    Pardon typos; sheep have hooves, not hands.
    29,000?gal in-ground concrete rectangular
    Pump: Hayward SP2610x15 Filter: Hayward S-244T (Sand) Chlorinator: Hayward CL-200
    2 skimmers; plugged main drain (reason unknown)
    New pool owner! Hooray! /sarcasm

  9. Back To Top    #9
    jrs_diesel's Avatar
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    Re: Skimmer suction

    Two hole in the bottom of the skimmer? I have that in my pool, and the hole nearest the pool goes to my main drain, the other hole to the pump. I you don't have a main drain, the second hole should be plugged or blocked off.

    As far as the filling/draining thing. The only thing I can think of there is that your wier (skimmer door) is either stuck or sticking in place. It should freely move from wide open to fully shut. It has a float built into the top of it so that when the pump is running the top edge of the wier is just below the water surface. The water level in the skimmer should be fairly constant and you should see water moving when the pump runs.

    Hope this helps.
    J.R.

    20K IG gunnite pool
    2HP Hayward single speed pump
    Cartridge filter

  10. Back To Top    #10

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    Re: Skimmer suction

    So.....here's the thing. Our skimmers don't have wiers. It was built in 1970 I guess so I'm not sure if that's a thing where they hadn't started doing wiers yet??

    As soon as I finish trying to clean my filter, I'm gonna try sticking a hose in the skimmer holes to see what happens.

    Pardon typos; sheep have hooves, not hands.
    29,000?gal in-ground concrete rectangular
    Pump: Hayward SP2610x15 Filter: Hayward S-244T (Sand) Chlorinator: Hayward CL-200
    2 skimmers; plugged main drain (reason unknown)
    New pool owner! Hooray! /sarcasm

  11. Back To Top    #11
    borjis's Avatar
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    Re: Skimmer suction

    you can get generic weir doors with spring loaded feet (just measure your skimmer square area) on amazon for 15 bucks.

    Mine was missing so I got one and the skimmer works a lot better now at drawing in surface debris
    and drawing down into the basket instead of floating around then coming out of the skimmer when
    the pump goes off.
    16x32 IG Vinyl, 13,000 Gals. Hayward S-244T sand filter, SP2810X15 pump
    (1.5 HP motor) Raypak PR266AEN (266k btu) gas heater. TF-100 Test Kit.
    Dolphin E10 Cleaning Robot.

  12. Back To Top    #12

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    Re: Skimmer suction

    Upon closer inspection, it appears I am a liar. Both skimmers do in fact have weirs. I just never noticed them because they are stuck open.

    So I'll work on that. In the meantime, is there an easy way to discover where each skimmer hole goes?

    Pardon typos; sheep have hooves, not hands.
    29,000?gal in-ground concrete rectangular
    Pump: Hayward SP2610x15 Filter: Hayward S-244T (Sand) Chlorinator: Hayward CL-200
    2 skimmers; plugged main drain (reason unknown)
    New pool owner! Hooray! /sarcasm

  13. Back To Top    #13
    jrs_diesel's Avatar
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    Re: Skimmer suction

    Not easily. The hole with water getting sucked into it will be obvious, as that one goes to the pump. The other hole may be plugged, but if it isn't then you may have once had a main drain that got capped off.
    J.R.

    20K IG gunnite pool
    2HP Hayward single speed pump
    Cartridge filter

  14. Back To Top    #14
    Mod Squad jblizzle's Avatar
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    Re: Skimmer suction

    Do you have a hole in the pool below the skimmers that could be an equalizer valve?

    Usually that surging water behavior in a skimmer is due to the water level being too low or the weir getting stuck closed.
    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
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  15. Back To Top    #15

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    Okemos MI
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    Re: Skimmer suction

    Nope. Nothing like that.

    Just turned the pump on with the skimmer line open and it's working FINE. OF COURSE. Wonder if there was air in the line from winter? Like the professional pool guys we hired to open our pool never bothered to open and unplug that skimmer because it didn't have an easy turn thing?

    Pardon typos; sheep have hooves, not hands.
    29,000?gal in-ground concrete rectangular
    Pump: Hayward SP2610x15 Filter: Hayward S-244T (Sand) Chlorinator: Hayward CL-200
    2 skimmers; plugged main drain (reason unknown)
    New pool owner! Hooray! /sarcasm

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