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Thread: VF Owners - What's your backwash GPM?

  1. Back To Top    #1

    Join Date
    Jun 2010
    Pleasanton, CA

    VF Owners - What's your backwash GPM?

    Just curious what VF owners use for their backwash GPM setting.

    I have an older pool, with 1.5" piping, and reluctant to go much above 45 or 50 GPM. I just installed a VF pump yesterday, and based on viewing the filter pressure, I think the old 1 HP pump may have been pushing about 50 GPM or a bit less. It has a 48 square foot DE filter, and I just replaced all the grids today, due to the Leslies replacements not lasting much more than a year. (The internal skeletons started breaking, the original grids lasted about 10 years.)

    Thanks for your input,

    14K gallon plaster pool with spa, solar heated, Intelliflo VS pump, Pentair Clean & Clear cartridge filter, using BBB, TF-100 test kit

  2. Back To Top    #2

    Join Date
    May 2007
    South Central NJ

    Re: VF Owners - What's your backwash GPM?

    75 is pretty much the max for 1.5 plumbing but 65 is about perfect for backwash. While the suction lines are 1.5", having them feed a 2" main to the pump helps!

    Owner of - PoolGuyNJ LLC
    Expert Pool and Spa Repairs, Renovations, and Augmentation. Helping people decide what is the right gear for meeting their needs. Expectations Set, Expectations Met, No Surprises.

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