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Thread: I have a few questions before I buy a new pump..

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  1. #1
    Join Date
    Jun 2006
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    Default Re: I have a few questions before I buy a new pump..

    The BHP of the Sta-Rite currently installed is 1.25Bhp (1Hpx1.25sf). I like the idea of a 2 speed pump but have 110V running to that area and it would be a huge pita to run 220V there.

    Would the 1/2hp be enough? I didn't understand your calculation.

    Thanks!
    J.

  2. #2
    mas985's Avatar
    mas985 is offline Lifetime Member Whizbang Spinner mas985 3 stars mas985 3 stars mas985 3 stars
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    Default Re: I have a few questions before I buy a new pump..

    Pentair Whisperflow and other companies have 2 speed pumps that run on 115v so that should not be deciding factor. With the 2 speed, you can get a 3/4 HP full rated pump so that all your features and vacuum will work properly when needed and you can run it on slow speed for extra savings.

    My point with the calculation was that with the 1/2 HP, your head loss will drop to about 40 feet (corrected for your actual current BHP). So the 1/2 HP pump would provide about 63 GPM. You need to compare this with your current GPM to see if it is significantly different. My guess is it is slightly less.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  3. #3
    Join Date
    Jun 2006
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    190

    Default Re: I have a few questions before I buy a new pump..

    According to my current pump specs with 50ft of total dynamic head it flows 60gpm. I was counting on a Hayward unit but will look at the Pentair. Hopefully they won't break the bank......

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