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Thread: Any risks to upgrading motor size?

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    Join Date
    May 2009
    Location
    Louisville, KY
    Posts
    8

    Any risks to upgrading motor size?

    I've got an inground pool that's somewhere around 16,500 gallons and currently running with a Hayward Super II, 3/4 HP pump. I'm pretty sure the motor's dead and I was looking to replace it myself. I've been told I need to move up to at least a 1 HP motor... But then the stories start changing - one guy tells me I can drop it in, same impeller and everything will be fine.. another tells me I'd need a new impeller and I'd do better just replacing the entire pump.

    Can anyone set me straight?

    If I try to drop a 1 HP motor in place of a 3/4 HP motor, do I need to change/upgrade/swap anything else in the process?

    Thanks!
    28000 gal. Quartz, 2hp Pentair pump, Pentair Cartridge Filter, 2x 1hp pumps infloor cleaning,
    Pentair Heatpump, Eco-Matic 36 SWG (POS), DEAD Ultra-Pure Ozone (also POS)
    2hp waterfall pump, 1hp fountain pump
    http://www.paddockpoolsucks.com

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    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
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    30,085

    Re: Any risks to upgrading motor size?

    I can't help you with how to change out the motor but I can tell you for sure the 3/4 hp is plenty of pump for that size pool.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

    Join Date
    May 2008
    Location
    Fair Oaks Calif
    Posts
    44

    Re: Any risks to upgrading motor size?

    Replacment part list for pump can be found here:http://www.haywardnet.com/pdfs/repla...114Hay2009.pdf

    Scroll to bottom of page and you will find impellers are matched to motor HP.

    Pump performance data is here http://www.haywardnet.com/inground/p...m?ProductID=11

    As duraleigh stated 3/4 hp should be sufficient but you can calculate desired pump size from the performance data and desired run time.
    17000 gal free form plaster pool with 900 gal spillover spa, shared 2 HP 2 speed pump, cartridge filter, Pentair IC40 SWG, solar and gas heater, 1 hp pump for water features, 1.5 hp pump for spa. Dolphin Diagnostics robotic cleaner.

  4. Back To Top    #4

    Join Date
    May 2009
    Location
    Louisville, KY
    Posts
    8

    Re: Any risks to upgrading motor size?

    Thanks for the helpful info guys!

    I may have dodged the bullet for now - looks like the motor wasn't wired in as well as it should have been, one of the wires had worked it way off the lead. Everything's up and running for the moment... Keep your fingers crossed for me!
    28000 gal. Quartz, 2hp Pentair pump, Pentair Cartridge Filter, 2x 1hp pumps infloor cleaning,
    Pentair Heatpump, Eco-Matic 36 SWG (POS), DEAD Ultra-Pure Ozone (also POS)
    2hp waterfall pump, 1hp fountain pump
    http://www.paddockpoolsucks.com

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