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Thread: Calculating flow rate?

  1. Back To Top    #1
    Jerry's Avatar
    Join Date
    Aug 2009
    New Orleans

    Calculating flow rate?

    My pump's flow rate is not marked...How can I calculate the rate to figure hours of operation per day?

    I't a Hayward MaxFlow 1 hp....3450 RPM.
    It runs about 20-22 psi.
    10,000 Gal. Inground Plaster Lap Pool
    Sand Filter
    New Orleans, LA

  2. Back To Top    #2
    spishex's Avatar
    Join Date
    Oct 2008
    Hillsborough, NC

    Re: Calculating flow rate?

    To know for sure you'd need a vacuum gauge to test your suction side pressure, but if your pressure side reading is accurate you're at about 46' + suction head. That would put you somewhere between 50 and 60', which for your pump is anywhere in the 27-50 GPM range.

    This is assuming a max-rated pump (SF 1.0) and that your pressure gauge is accurate.

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