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Thread: When to use hi versus lo speed on 2- speed pump

  1. Back To Top    #1

    Join Date
    May 2008
    Ridgewood NJ

    When to use hi versus lo speed on 2- speed pump

    I just installed a hayward super 2 2 speed pump to replace my old hayward super 2 1 speed pump. I wired a spdt toggle to control the speed as per suggestions here and it seems to be working well. I discovered my pump failure about 2 days after opening the pool. I have not yet backwashed and filter pressure which is usually 18 after a backwash is 28 when the pump is on hi and about 10 when the pump is on low speed. I will backwash the filter later this evening.

    It seems that my polaris 280 which has a booster pump does not work when the pump is on low but does work when the pump is on hi. Is this normal? As I never have had a 2 speed I need instruction on how and when use the high vs the low pump speed.
    35,000 gallon IG pool. pebblefina sapphire galaxy finish
    2hp Hayward 2 speed pump, Hayward DE600 grid filter, Hayward Heater, Polaris booster and 280 cleaner

  2. Back To Top    #2
    maxepr1's Avatar
    Join Date
    Mar 2011

    Re: When to use hi versus lo speed on 2- speed pump

    Your Polaris it's going to work until the booster is on. On high water is going through it but it is not really on. It's still got water running through when your in low, the flow is so little that is it's going move very much. High is used for backwashing, priming and higher circulation. If your run time is 10 hours, you can break it up say 2 hours High and 8 Low. It's up to you, whatever makes pool look the best.
    40'x19' IG Diamond Brite 29K 4' Waterfall/Dive Rock FNS60 DE 2x2hp Whisperflo pumps Aqualogic(P4) SWG TF100 Tester

    Pool School, Pool Calculator,TFTestKits,

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: When to use hi versus lo speed on 2- speed pump

    Normally pool cleaners that use a booster pump still work just fine when the main pump is on low. There is an adjustment on the Polaris to get the wheels to turn at the correct speed. It is possible that that needs to be adjusted to get everything working correctly on low speed. If that isn't it, there may be some problem that is interfering with the booster pump just enough to cause trouble on low but not on high. A partial blockage of the booster pump intake or polaris hose could, in theory, do that.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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