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Thread: What size motor?

  1. Back To Top    #1

    Join Date
    Jul 2014
    Location
    Harrison Township, MI
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    41

    What size motor?

    Ok, my 1.5hp motor on my Hayward Superpump died. After asking some questions on here I have determined a few things:

    My old motor is a single speed 1.5hp with a SF of 1.3
    I want a dual speed motor
    I am having my electrical switched over to 230v so I can utilize a dual speed pump
    I have about 80' of skimmer lines (2 skimmers)
    I have about 50' of line to my drain
    I have 4 returns
    I have a Hayward S244T filter with 50 psi working pressure

    The guy at Inyo pools says I need a 2 1/2 or 3 hp motor! The pool seemed to run okay with the 1.5 hp motor last year, although it was our first year in this home so we have nothing to compare to.

    What size motor do I REALLY need for my set up?

    Thanks for your help!
    20x40 IGP w/ vinyl liner ~ approximately 30,000 gallons ~ Hayward 1.5hp pump ~ Hayward S244T Sand Filter ~ Hayward Gas Heater ~ 1 drain, 2 skimmers, 4 returns ~ Protect-A-Child Fence ~TF-100 kit

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
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    Tucson, AZ
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    37,389

    Re: What size motor?

    There is absolutely no reason to have a pump as big as they were suggesting.

    I would just get a 2 speed motor with the same HP & SF (or product of the 2) and put it on your existing pump.

    Nothing you wrote calls for high flow rates, so no reason to go bigger.

    This might be a good read for you as well: Determine Pump Run Time
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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  3. Back To Top    #3

    Join Date
    May 2009
    Location
    Youngsville NC
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    395

    Re: What size motor?

    As long as the new motor has an SFHP of 1.95 or larger, it should work. If you are putting in a whole new pump, then you might consider a 1 HP 2 speed pump.
    16x32 IG 19,000 gallons, Pentair 1.5 hp Energy Efficient Superflo pump (348024),vinyl liner, Chlorine dispenser, Hayward S-244T sand filter

  4. Back To Top    #4

    Join Date
    Jul 2014
    Location
    Harrison Township, MI
    Posts
    41

    Re: What size motor?

    Thanks guys! I ordered a replacement 2-speed motor with the exact same hp and sf. I appreciate your replies!
    20x40 IGP w/ vinyl liner ~ approximately 30,000 gallons ~ Hayward 1.5hp pump ~ Hayward S244T Sand Filter ~ Hayward Gas Heater ~ 1 drain, 2 skimmers, 4 returns ~ Protect-A-Child Fence ~TF-100 kit

  5. Back To Top    #5
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: What size motor?

    Good deal. You will need to add a manual switch. You can find some motor end caps that have a switch, or easy to use a household 3-way light switch between the timer and the motor.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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