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Thread: Pressure Drop While Vacuuming?

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    Pressure Drop While Vacuuming?

    My question is - is it normal for the pressure gauge on the pump to go down while vacuuming the pool? When I am done vacuuming, the pressure goes back up to 10. I might add that everything is working fine - vacuums fine, etc., no leaks, etc. It is just that I noticed that the gauge drops down to about 5 when vacuuming.

    Normal???
    15x30 AG 48" deep Oval
    Hayward 1.5 Power Flow Max LX Pump, Hayward E Series Sand Filter
    Superior Spa (Made right here in Oklahoma) with 96 jets
    800 feet of 2 level decking around pool and spa overlooking beautiful pasture and pond.
    Our own backyard paradise

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    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    Re: Pressure Drop While Vacuuming?

    Yes, that is normal.

    A vacuum creates additional resistance on the suction side of the pump, so there is less energy left to provide pressure on the pressure side.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: Pressure Drop While Vacuuming?

    OH THANK YOU!!!!! You have taken a worry off my shoulders!!!
    15x30 AG 48" deep Oval
    Hayward 1.5 Power Flow Max LX Pump, Hayward E Series Sand Filter
    Superior Spa (Made right here in Oklahoma) with 96 jets
    800 feet of 2 level decking around pool and spa overlooking beautiful pasture and pond.
    Our own backyard paradise

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