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Thread: Pump Sizing for Replacement

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    Join Date
    Mar 2014
    Location
    Oxford, MS
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    53

    Question Pump Sizing for Replacement

    I currently have an extremely loud hayward max-flo ii. When I bought the house, the pool builder I found who inspected it all for me suggested replacing the entire pump, as he said he replaced the motor a couple of years ago yet it's still loud. It was a 1-hp model. How do I know what size pump to buy, I've been looking at this one: http://amzn.com/B000UXPFMU, the 1HP model. Stats should be in signature, if more info is needed let me know. I figure a single speed is 'Good Enough' for me, considering the price jump to a two-speed, I just don't see myself making up the difference with our cheap electric prices anytime soon. Is there a poolmath equivalent for pump sizing that I'm missing?
    ~26k ~16'x40' in-ground vinyl (the big green monster) - Hayward MaxFlo II 1HP pump - Jacuzzi sand filter
    Polaris 280 w/ booster pump - TF-100 + Speedstir

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    mas985's Avatar
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    May 2007
    Location
    Pleasanton, CA
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    11,487

    Re: Pump Sizing for Replacement

    Pump sizing is usually pretty simple. Without a spa or water feature, you can pretty much get the smallest pump possible and it would be fine. The SuperFlo is a good choice.
    Mark
    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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    Mar 2014
    Location
    Oxford, MS
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    Re: Pump Sizing for Replacement

    In that case, would the 3/4 hp model be sufficient? Thanks.
    ~26k ~16'x40' in-ground vinyl (the big green monster) - Hayward MaxFlo II 1HP pump - Jacuzzi sand filter
    Polaris 280 w/ booster pump - TF-100 + Speedstir

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    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,487

    Re: Pump Sizing for Replacement

    The 3/4 HP is only slightly smaller than the one you have so t should be fine.
    Mark
    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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