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Thread: Add a small pump to the system

  1. Back To Top    #1

    Add a small pump to the system

    This whole discussion gives me a thought. I have a perfectly viable 1 1/2 hp pump on my pool.

    The only time I need any where near that much pump is for vacuuming. My pool is covered and is very well serviced by a half hour a day all winter long.

    It occurs to me I could simply add a small pump to the system with a suitable check valve to run the filter and then use the big pump only a couple of hours a week to keep it clean.

    The rub however is I don't think there is anyway to buy such a pump. What I would need would be something equivalent to a variable speed pump runnig at around 1000rpm. Maybe 10 or 15% of a one hp?

    But it looks to me like such a pump does not exist.

    Anyone think of one? Maybe off a small above ground or such.

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

    Re: Pool Pump Energy Cost Comparison

    Put a two speed motor on your current pump and you have basically what you are describing but in a single pump. Plus the motor should be less expensive than adding a second pump. On low speed, it would have 1/2 the flow rate and 1/4 of the energy use as your current pump. Not quite as good as a VS pump running at 1000 RPM but good enough to save a lot in electricity.

    BTW, welcome to the forum.
    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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