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Thread: Over sized pumps

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    Join Date
    Oct 2015
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    Over sized pumps

    Today I installed a FloVis flow meter at the pump discharge.

    85 GPM @ 12.5 psig. At that flow rate my pool turns over in less than 3 hours.

    The motor is rated at 3 HP.

    Its safe to say that this pump is over sized. I see a two speed pump in my future.
    In ground, 14,000 gallon, white plaster, unheated, stone waterfall, DE Filter, Rainbow 320 Cl, Polaris 3900, FloVis flow meter, F100 test kit, Circupool RJ30+ SWG, Circupool VJ1/Speck Badu EcoM3V variable speed pump.

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    mas985's Avatar
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    May 2007
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    Re: Over sized pumps

    Certainly over sized for filtering and circulation but it may not be over sized for the waterfall although 85 GPM is very low for a 3 HP pump. What is the pump make/model and do you have 1.5" plumbing?
    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

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    Re: Over sized pumps

    2" piping. I'm not able to read any info off of the pump itself, all of the info has been weathered away.
    In ground, 14,000 gallon, white plaster, unheated, stone waterfall, DE Filter, Rainbow 320 Cl, Polaris 3900, FloVis flow meter, F100 test kit, Circupool RJ30+ SWG, Circupool VJ1/Speck Badu EcoM3V variable speed pump.

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    mas985's Avatar
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    Re: Over sized pumps

    Then how do you know it is a 3 HP pump? Does it say SPL anywhere near the 3 HP rating?
    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

  5. Back To Top    #5

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    Oct 2015
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    411

    Re: Over sized pumps

    It has a 3 HP motor.
    In ground, 14,000 gallon, white plaster, unheated, stone waterfall, DE Filter, Rainbow 320 Cl, Polaris 3900, FloVis flow meter, F100 test kit, Circupool RJ30+ SWG, Circupool VJ1/Speck Badu EcoM3V variable speed pump.

  6. Back To Top    #6
    mas985's Avatar
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    May 2007
    Location
    Pleasanton, CA
    Posts
    11,490

    Re: Over sized pumps

    So there is still a label on the motor? Does the motor label say SPL anywhere or is there a service factor listed?
    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

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