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Thread: High pressure, low flow

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    Join Date
    May 2014
    Location
    St Louis, MO
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    32

    High pressure, low flow

    Flow into pool was lower than usual so I backwashed to clean sand filter. The unit is giving me a low flow warning when back washing. When I switch back to filter, flow into the pool is still not as strong as normal. Any suggestions?

    Thanks
    24'x52" AGP 13,200 Gal Hayward Sand Filter w/ 2 speed pump Taylor K-2006 Test Kit

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    Mod Squad woodyp's Avatar
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    Apr 2010
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    East Texas
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    Re: High pressure, low flow

    Any bubbles in the pump basket?
    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
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    May 2014
    Location
    St Louis, MO
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    Re: High pressure, low flow

    I checked it again. I guess the output into the pool feels normal. But when backwashing the flow out of the waste line was flowing fast, at first like normal, then would slow and I would get the low flow warning. There aren't any bubbles in pump basket. Thanks
    24'x52" AGP 13,200 Gal Hayward Sand Filter w/ 2 speed pump Taylor K-2006 Test Kit

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    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    37,879

    Re: High pressure, low flow

    Low flow warnings while backwashing are normal. The water is going out the backwash port instead of past the flow sensor on the way to the pool.
    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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