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Thread: Pressure lost when vacum

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    Pressure lost when vacum

    I cold have sworn I seen someone else with this problem but i cant find it. My pressure is fine until i hookup to vacuum, after just a short period of time it loses its suction. But if I dont have the vacuum hooked up the suction stays good. Anybody have any ideas? Sorry if this has been asked already and I am to dumb to locate the post.
    27' Round AG, 17,200 gallons, sand filter

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    Hi poolidiot
    If you get all the air out of the vac hose before you plug it into the skimmer and get the valve turned to full skim and it starts to work and then quits you might have a small leak in the vac hose. hope this helps Ric W
    Ric W
    My Pool
    8605 gal fiberglass, 3/4 hp pump, sand filter, aquabot cleaner, heat siphon heat pump, tiger river(sumatran) spa

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    Thanks ric, but I have an automatic cleaner and a manual one (diffrent hose for both) and have tried both and get the same result. And I shot water through the hose by the return till all air is out. So I dont think it is the hose or air in the line
    27' Round AG, 17,200 gallons, sand filter

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    YIKES!!!! No other suggestions? Guess it is time to experiment then .
    27' Round AG, 17,200 gallons, sand filter

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    divnkd101's Avatar
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    Are you able to isolate suction to that one skimmer you are attaching the vacuum to?
    MIKE

    21K Inground Custom w/ Spa (Gunite/Plaster), SWCG, Hayward Northstar, Polaris 280, Hayward Color Logics, Jandy PS-8

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    divnkd101,
    I have a 27' AG, so i have just 1 skimmer
    27' Round AG, 17,200 gallons, sand filter

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    divnkd101's Avatar
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    You are down south so there are a few things that you can do. Either jump in and verify that indeed you have no air in your vacuum line, or pressure test the line to make sure it is not cracked and air is getting in once you have it hooked up. Everything points to the hose itself. Keep us posted. Good Luck
    MIKE

    21K Inground Custom w/ Spa (Gunite/Plaster), SWCG, Hayward Northstar, Polaris 280, Hayward Color Logics, Jandy PS-8

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    duraleigh's Avatar
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    A little clarification...

    When you start the pump and are not vacuuming, what does your pressure guage say? Then, when you vacuum, what direction does your pressure guage go...up or down?

    Lastly, does your pump strainer basket have a clear lid that you can see into? If so, do you see any air bubbles in the lid before or after you vacuum?
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Ok, I feel like an Idiot, (see my name does fit) But I decided to just backwash the filter and see what would happen. Must have been pretty dirty cause after I did that the vacuum works, never lost pressure. And I did jump in and ran the vacuum was a bit cold , water was 68 Thanks for all the suggestions.
    27' Round AG, 17,200 gallons, sand filter

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    divnkd101's Avatar
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    You may feel like an idiot but I guarentee you that you just saved someone from making the same mistake down the road. Thanks for sharing the outcome. You can't learn if you don't ask questions. That is why we are all here.
    MIKE

    21K Inground Custom w/ Spa (Gunite/Plaster), SWCG, Hayward Northstar, Polaris 280, Hayward Color Logics, Jandy PS-8

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