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Thread: 110v VS 220v pump

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    kywildcats's Avatar
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    110v VS 220v pump

    What's the opinion from everybody about pump size? Getting ready to dig in ground pool, 20x28 feet. Depth is 3'4 to 5'6, no real deep end!
    Pump will be about 15 feet from the pool. I don't have 220 in my garage as of now. I have room in my breaker box to add it if needed.

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    Richard320's Avatar
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    Re: 110v VS 220v pump

    The only advantage I can see to going the low voltage route is that if you suffer from power outages regularly, you can run the pump off a generator. A generator that has 220 V outlets is going to be expensive.
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    kywildcats's Avatar
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    Re: 110v VS 220v pump

    I do have a large generator that will power the 220, but we don't experience frequent outages, unless bad storms or something. Thank you!

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    Mod Squad JohnT's Avatar
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    Re: 110v VS 220v pump

    220 uses smaller wire to deliver the same power to the pump. That can be a significant cost savings if the run is long.
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    Re: 110v VS 220v pump

    Think of it this way - your motor for the pump draws the same amount of power (watts), Power = Volts * Amps. So, using half the voltage will require twice the amps (the power draw of the motor is going to be a constant for all intents and purposes) . In real world terms - (as an example) - my pump runs on about 1400 watts . I run on 240V, so the amp draw will be 1400/240 = 5.83 Amps. Running the same motor on the same load on 120v would be 1400 / 120 = 11.7 amps. The wire needed for a 240V run will not need to be as large as the wiring for 120V for the same pump, and the 240V should be less susceptible to voltage drop over a run of wire.

    You SHOULD be using GFCI breakers for your pool equipment, for everyone's safety. This is where 120V has an advantage. You can find 240V dual pole 240 GFCI breakers, but my GE 20Amp ran about $90-$100 - compared to your typical 120V GFCI breaker being about half that.
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    Divin Dave's Avatar
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    Re: 110v VS 220v pump

    I will just throw in my comment also. Most pumps 1 HP and larger are 220V, so finding the right pump for your pool in 120V means there will likely be less of a variety of pumps for you to choose from.
    Divin Dave,
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    Mod Squad jblizzle's Avatar
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    Re: 110v VS 220v pump

    Dave, I think that is true for 2 speed motors, but many/most single speed pumps are dual voltage aren't they?

    In any case, I would recommend a 1HP 2 speed (which is 220v).
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    Divin Dave's Avatar
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    Re: 110v VS 220v pump

    It might be Jason
    I do agree 100% the option of 2 speed is difinitely limited for 120V ones
    Quote Originally Posted by jblizzle View Post
    Dave, I think that is true for 2 speed motors, but many/most single speed pumps are dual voltage aren't they?

    In any case, I would recommend a 1HP 2 speed (which is 220v).
    Divin Dave,
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    Re: 110v VS 220v pump

    3/4 hp 2-speed 115v are available. It's what I'm running.
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