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Thread: Replace the motor of a single speed pump with dual speed?

  1. Back To Top    #1

    Join Date
    May 2009
    Tucson, AZ

    Replace the motor of a single speed pump with dual speed?

    I just calculated how much electricity my pump (Hayward Replacement Series 750) is using and I am displeased. It's using at least 2300 kWh per year, which is about 1/3 of my annual electricity consumption.

    It's only 3 years old, so I'm reluctant to spend the money to replace the pump with something like the Intelliflo (although I am half-considering the idea), but I'd like to use less electricity. Is it possible to replace the single speed motor with a dual speed? Is there another option I should consider?
    18,000 gal plaster IG. Sand filter. 3/4 HP single speed pump.

  2. Back To Top    #2
    mas985's Avatar
    Join Date
    May 2007
    Pleasanton, CA

    Re: Replace the motor of a single speed pump with duel speed?

    You can usually find a 2 speed motor which will work in the pump but you need to make sure that you match the brake HP of the two motors (i.e. Brake HP = Label HP * Service Factor). So the new brake HP must be at least the old brake HP and can even be a little larger. Also, when shopping for the new motor look for the same frame so that it can be installed in the old pump housing.
    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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