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-   -   Flow rate (https://www.askmehelpdesk.com/showthread.php?t=373449)

  • Jul 8, 2009, 06:00 PM
    pumpking
    Flow rate
    How do I figure out the gpm from my pump size of 3/4 hp motor with 3450 rpms?
  • Jul 8, 2009, 06:04 PM
    Perito

    You need a lot more information than that. I can think of a few things you'll need to know: the pipe diameter, the supply head, the head you're pumping against, bends in the pipe, the viscosity of the fluid being pumped, the type of impeller in the pump, etc. I assume you're pumping water so the viscosity and fluid identity are known. You still need more information.

    Manufacturers often have charts that will give approximate indications.

    Try this:

    Pump manufacturers.com calculators

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