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Thread: Variable speed pool pump vs Single speed pump

  1. Back To Top    #1

    Join Date
    Sep 2016
    ontario, Canada

    Variable speed pool pump vs Single speed pump

    I am looking for opinions on pump replacement. I had a Hayward super pump (1hp 230V) recently die on me. Motor would hum when turning it on until the thermal breaker on the motor would blow. I took the pump portion off the motor and could only get it to work if I spun the impeller several times by hand. The motor housing shows signs of overheating, several hot spots on the case. My question is do you think it is worth getting this motor rebuilt? Buy a brand new single speed pump? Buy a brand new 2 speed pump? Buy a brand new Vs pump?
    Is it really worth paying the extra money (at Least more than double) up front for the Vs pump when I don't run my pump 24/7 for 12 months? I live in southern Ontario and we get real winter weather!!!!! I usually open my pool at the end of May and close at the end of September depending on the weather!!!!
    Thank you and I look forward to hearing some great advise!!!!

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

    Re: Variable speed pool pump vs Single speed pump

    That could just be a problem with the start capacitor which are easy to replace.

    But you might want to just replace the motor with a two speed motor anyway. Much more cost effective and no plumbing changes.
    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. Back To Top    #3
    Teald024's Avatar
    Join Date
    Aug 2016
    Columbus, Ohio

    Re: Variable speed pool pump vs Single speed pump

    If you end up needing to replace the motor, I would recommend going with a 2 speed motor. The additional cost above a single speed will pay for itself with energy savings. How long to get your money back will depend on usage, but does pay for itself, and once it does you get to enjoy the reduced power consumption and its impact on your wallet.
    Dave - Aqua Leader Elegance AGP 15'x30'x 54", 12k gallons, vinyl liner ... Hayward/SwimPro Voyager pump SW159412STL, 2hp, 2spd, Hayward/Voyager 175sf element filter SW175MDDVPAKS, Installed August 2016 ... Liquid Chlorine, Stenner, Woods 50015 timer ... TF-100 .... CYA/Chlorine Chart ... Recommended Levels ... Basic Care Schedule ... Extended-Test-Kit-Directions ... ABCs of Pool Water Chemistry

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    GaryT58's Avatar
    Join Date
    Jul 2016
    Monroe, GA

    Re: Variable speed pool pump vs Single speed pump

    Unless your electric is very expensive, the way you describe how you will run, a variable speed would probably take many years, if ever, to pay back over a 2-speed. So a 2-speed is the way to go for you - this from a variable speed owner.
    38'x16' Fiberglass pool - 3.5' - 8' deep - 19,000 gallons. AutoPilot Total Control SWG (RC-52 cell), Pentair SuperFlo VS, Pentair SD70 Sand Filter, Coverstar Automatic Cover, 10' board, PAL Treo lighting, Polaris 9550 Sport robot, Lamotte ColorQ Pro 7 test kit.

  5. Back To Top    #5

    Join Date
    May 2015
    Markham, ON Canada

    Re: Variable speed pool pump vs Single speed pump

    I live in S Ont too; did the math using the new hydro rates and a 5mth-6mth pool season. Needed to replace our single sp 1HP Hayward this spring, the pump motor & seal was 9 seasons old, (motor shell was running hot past 2 yrs; would likely fail when i went on vacation ...murphy's law)

    I purchased a 2sp 1.5hp Energy star pump. Run it on High sp 6-8am and 6pm -9pm during the off peak billing period. runs on low sp during the day. Total run time in the summer is 5am to 11pm during the daylight hrs. The water remained crystal clear (TFP managed too) and skimmed surface very well. Used Hi sp for vac, backwash etc. Payback on the VS would be many years, i also worried the digital controller &/or the motor would likely fail due to age and freezing climate impact, before payback. YMMV My pool equip is outdoor nothing moved inside over winter... (should build a small enclosure some day)
    30yr old 16 x 32 IG Oval vinyl liner + 20,400 Gal + 1.5HP 2sp Sta-rite Dyna Pro (2 mech timers - Spd & ON/OFF) + Stenner CL pump & Digital timer + Jaccuzi sand filter + Kreepy Krawly + Hayward heater + 5 month season + TF100 test kit + 12% Cl2 + HCl + NaHCO3

  6. Back To Top    #6

    Join Date
    Oct 2007
    Valrico, FL

    Re: Variable speed pool pump vs Single speed pump

    I second (or third) the advice of going to a two speed motor. Keep the pump find a two speed motor with the same frame size and install it on the pump. As a bonus you might find the that two speed motor runs quitter and uses less power even on high speed. However like Mark said it might just be the capacitor(s). Very low cost to replace.
    7,500 gal, IG pool, L shape 22' x 15', 1.5 hp pump, cartridge filter, AquaPlus SWG/Controller, Pebble-Tec liner.

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