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Thread: How do I find my GPM?

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    Ronald U.'s Avatar
    Join Date
    May 2015
    Pearland, Texas (near Houston)

    How do I find my GPM?

    I have an A. O. Smith Century Centurion B150 2 hp. pump. I don't see GPM on the info. plate. How do I obtain GPM so I can calculate how long it takes to turn over one full pool volume? Thank you all. RU
    In-ground gunnite, 24k gal., Hayward DE filter, bleach, borate, Hayward Tiger Shark robotic cleaner, 75% full sun

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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: How do I find my GPM?

    Calculating flow rate is not trivial and generally there is no need to know it. There is no reason to try to have some minimum number of turnovers in a day, that is an old pool-ism. New research suggests you actually need very low turnover and only a few hours of pump run time is fine. See the Determine Pump Run Time article in Pool School.
    Jason, TFP Moderator
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