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Thread: Now won't hold suction to vacuum

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    Now won't hold suction to vacuum

    Several of you helped find the leak in the suction side from an earlier post, but now, I'm having trouble maintaining suction. It starts off fine, but then all of a sudden I will notice it stops picking up from the bottom of the pool, and sure enough, the suction is gone. It happen yesterday, but I thought it was due to a lower water level since I had been vacuuming to waste. However, today, the water level is more than fine, and the same thing happened.

    My signature below has changed regarding the pump (can't see how to edit what appears), but we now have a Hayward, 1 Hp. Can't quite stay on top of the massive amts of pollen settling on the pool with this pump thing going on! Thanks!
    22,500 gal A.G., vinyl, sta rite crystal sand filter- Pentair Water Pool & Spa , Hayward Super Pump Self Priming 10" lift, BBB method

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    Mod Squad woodyp's Avatar
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    Re: Now won't hold suction to vacuum

    If you're using one of those "vacuum plates"..........try sticking the hose end directly into the hole in the bottom of the skimmer instead. Only way I can get suction when using the manual one.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

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    Re: Now won't hold suction to vacuum

    Woodyp, I'm not sure I understand here. What do you mean by using a vacuum plate? I have the usual above ground pool set up...flush air out of hose by using return jet, then attach the vacuum attachment to the skimmer, then attach the hose to that. Can you explain a little deeper please? Thanks!
    22,500 gal A.G., vinyl, sta rite crystal sand filter- Pentair Water Pool & Spa , Hayward Super Pump Self Priming 10" lift, BBB method

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    Mod Squad woodyp's Avatar
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    Re: Now won't hold suction to vacuum

    Most AGP skimmers come with a separate plastic vacuum plate that they want you to attach the hose end to. This would then sit flat on top of the skimmer basket...........the idea being for the basket itself to catch any of the rough stuff before being sent to the pump strainer basket. They are notorious for not being able to maintain a good suction seal-especially if the water level isn't high enough.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

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    duraleigh's Avatar
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    Re: Now won't hold suction to vacuum

    It starts off fine, but then all of a sudden I will notice it stops picking up from the bottom of the pool, and sure enough, the suction is gone.
    The simplest explanation to that symptom is your filter is clogged. When your vacuum head stops working, do you backwash?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Now won't hold suction to vacuum

    Water level isn't the problem, and this seems to be the first year we've had problems losing suction this much, but I'll try backwashing. I didn't think there was that much stuff but perhaps there was. I'll give that a try. Woodyp, is it safe to bypass the skimmer basket? Seems all that stuff would be plugging up the works somewhere else deeper down the line?
    22,500 gal A.G., vinyl, sta rite crystal sand filter- Pentair Water Pool & Spa , Hayward Super Pump Self Priming 10" lift, BBB method

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    Mod Squad woodyp's Avatar
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    Re: Now won't hold suction to vacuum

    I always dip net out anything I think may be a problem first if I don't just use my Pool Rover Jr. to get bigger stuff---------only thing I vacuum to a filter is plain old DIRT.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

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    Re: Now won't hold suction to vacuum

    Start paying attention to the pressure gauge on the filter. When the pressure increases 20% over the freshly backwashed pressure then it's time to backwash.

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