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Thread: Dual Speed Pump. I need some advice.

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    Join Date
    Apr 2017
    leesburg fl

    Dual Speed Pump. I need some advice.

    I have a dual speed pump for my 30,000 gallon pool that I am meaning to hookup. It switches from .25hp to 1.5hp. Can anyone tell me if its better to try and run it 8 hours with 1.5 or run it longer at .25? at .25 im assuming it would need to be on a good portion of the day. Really what im wondering if what would be best on my electric bill.
    30,000 In Ground Pool
    Pentair Sta-Rite Intellipro VS-3050
    425 Square Foot Hayward Cartridge Filter

  2. Back To Top    #2
    Mod Squad Jimrahbe's Avatar
    Join Date
    Jul 2014
    Bedford, TX

    Re: Dual Speed Pump. I need some advice.


    Each pool is a little different... You generally run a pump for three reasons:

    1. To keep surface debris moving and being pushed into the skimmers. The more debris the more often you need to run the pump.

    2. If you have a Salt Water Chlorine Generator (SWCG) you'll need to run it long enough to generate the amount of chlorine needed.

    3. To circulate the water to ensure the chlorine is effectively distributed throughout the pool. Two or three hours per day is all that is needed for this to happen in most pools.

    There really is no one answer that fits everyone.

    There is no reason to believe the old myth that you have to have x turnovers per day. It is just not true.

    Thanks for posting,

    Jim R.
    Finished in 2015 - 17K Gal, IG, 20' x 25' Almost Rectangular Pool, Pebble finish, three rockport water falls. Pentair Equipment: EasyTouch 4, IC40 SWG, 3 HP VS Pump, CCP520 Cartridge Filter.
    TF100 with SpeedStir and SampleSizer, ColorQ Pro 7, Dolphin Premier Robot Cleaner, added Screen Logic 2, added small 3 person Caldera Spa.

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Dual Speed Pump. I need some advice.

    Best for your electric bill is running the pump as little as possible

    Running on low move 1/2 the water for 1/4 the cost in power. So running on low for double the amount of time as on high would move the same water, but be 1/2 the power.

    In reality, your pool pump only needs to be on for a couple hours in a day to circulate the chemistry. Longer pump run times are only need if you have a SWG that needs longer to generate sufficient FC, or you have solar heating, or if it is needed to keep the debris out of the pool.

    You may find that the skimmer does not work well enough on low speed, so you might want to run on high for a period of time and then on low for a little longer. Generally the pump run time is driven by how clean you want your pool water.

    And of course remember that preventing algae is more a function of chemistry than 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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