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Thread: Single speed v. 2 speed v. variable speed

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    Prav's Avatar
    Join Date
    Nov 2010
    Miami, FL

    Single speed v. 2 speed v. variable speed

    So, due to age of current pump and motor (and it's about-to-go bearings), will consider replacing the entire pump.

    From a VERY quick look, seems Pentair has the 1½ single speed ($300) and VS (>$800) and since electricity in FL is relatively cheap, I would rather spend less because the VS savings would not be there. What I did not see (again, rushing to get out the door today) was a 2-speed Pentair... Do they have any?

    Many thanks,
    14'x30' (est. 14K gal) w/spillover spa (est. 500 gal) - 1995 // Diamond Brite Blue Quartz - 2006
    Hayward SwimPure Plus T-15 - 2013 // Zodiac MX-8 - 2013
    Plain ol' Intermatic mechanical timer // Pump: 1 HP Pentair SuperFlo - 2012
    Filter: Hayward C17502(S) Cartridge Filter - 2011 // Heat Pump: Sunrunner/Aquapro 1300 (127K BTU) - 2011

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    AnnaK's Avatar
    Join Date
    Jul 2007
    Eastern Pennsylvania

    Re: Single speed v. 2 speed v. variable speed

    Yes. We have a 1 HP Pentair Dynamo 2-speed and prior to that a 1.5 HP Pentair 2-speed. The 1 HP was a little harder to find but is more than adequate for our 12.5K pool.

    12,500 gal AGP, Hayward sand filter, Pentair 2-speed pump, timer.
    Please visit our Pool Issues pages for information about step weights, managing the solar cover, and PoolSkim.

  3. Back To Top    #3
    mas985's Avatar
    Join Date
    May 2007
    Pleasanton, CA

    Re: Single speed v. 2 speed v. variable speed

    The Pentair Whisperflo WFDS series are all two speed pumps. With the spa, you may want to stick with something close to what you had in terms of HP. The WFDS-6 is a full rated 1 1/2 HP two speed pump and the WFDS-28 is a 2 HP up rated pump which has the same performance as the WFDS-6.
    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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