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Thread: Variable Speed Pump

  1. Back To Top    #1

    Join Date
    Jul 2009
    Charlotte NC

    Variable Speed Pump

    6 year old pump is starting to make noise.Interested in the newer technology
    variable speed pumps.Not alot of info out on these.Any particulars I need to
    know to determine what kind I should get.PVC plumbing diameters,SWG,
    Programmable,Etc. Thanks
    16x34 kidney shape 19,000 gal vinyl IG
    Pentair IC-20 SWG
    Pentair sand filter
    Pentair 1HP pump

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Variable Speed Pump

    Variable speed pumps are generally only worth the extra up front costs if your electric rates are above $0.15/kWh.

    There are currently two classes of variable speed pumps, the larger more expensive more configurable versions and some newer smaller pumps that have limited control options. The larger pumps are much better when being used with automation systems, since they integrate well with the automation. The smaller pumps are best when you have a simple timer and they also cost less, which means they pay back the initial investment more quickly, but they integrate very poorly with automation systems.
    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

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

    Re: Variable Speed Pump

    Just to add, if your power is not that expensive, often a smaller 2-speed pump is the way to go. Cheaper up front and save a majority of the electrical costs.

    The cheapest option, is to just replace your motor with a 2-speed version and use your existing wet end of the pump if it is still in good shape (yours is only 6 years old so this could be an option). Adding the "go-kit" will allow you to replace all the seals in the pump as well.
    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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