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Thread: Help me pick the right sized pump please!

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    JamieP's Avatar
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    Help me pick the right sized pump please!

    After interviewing several pool builders, we have decided to brave the owner-builder route. I'm waiting on my engineering plans, but based on renderings from one particular builder, the pool is estimated to be about 41,000 gallons. It will be a basic pool with no spa or fancy water features, although it will have a TurboTwister slide and two bubblers.

    I'm wanting to pick at least a 2 speed Pentair pump (or VS if the cost and size make sense for my situation) and was looking for some recommendations on size and model. I know enough that I do not want to oversize the pump, but I really don't know what size I need. Our electricity rates here in TX are pretty good, and right now we pay about $0.074 per KWhr, if that makes any difference. Also, we will be going with the biggest cartridge filter that Pentair makes. If there is anything else relevant that I am missing, please feel free to ask.

    Thank you for any help you can offer!
    28,000 gallon freeform, Stonescapes Tropics Blue Minipebble with abalone, 3.5' to 8.5' depth. 2 skimmers, 5 returns, dedicated vacuum port, Dolphin Z5 robot. All Pentair equip: EasyTouch 8, IC60 SWG, VS pump, 520 Cartridge Filter, 3 Intellibrites, 2 Color Cascade Bubblers. TurboTwister Slide and 8' Salt System Jump Board. TF-100. My Jan-Mar 2016 build:
    Waxahachie, TX Owner Build - A race to beat the baby!!

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    JamieP's Avatar
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    Re: Help me pick the right sized pump please!

    These are the three possibilities that I'm looking into and would appreciate advice on. I was thinking that a 2 hp dual speed pump would be the right size, unless someone tells me that's overkill in my situation. I don't know all the differences between the Whisperflo and Superflo, but if I didn't just go in for the VS, I thought I heard the Whisperflo is better.

    Does anyone have any suggestions based in these options?

    Whisperflo:
    h) 1 1/2 hp two-speed (model 011522 or WFDS-6) (+$629.95)
    i) 2 hp two-speed (model 011523 or WFDS-8) (+$739.95)

    Pentair Intelliflo Variable Speed Pool Pump 011018 (On Sale For $848.95)

    Superflo:
    g) 1 1/2 hp two speed, 230V (=$449.95)
    h) 2 hp two-speed, 230V (=$469.95)
    28,000 gallon freeform, Stonescapes Tropics Blue Minipebble with abalone, 3.5' to 8.5' depth. 2 skimmers, 5 returns, dedicated vacuum port, Dolphin Z5 robot. All Pentair equip: EasyTouch 8, IC60 SWG, VS pump, 520 Cartridge Filter, 3 Intellibrites, 2 Color Cascade Bubblers. TurboTwister Slide and 8' Salt System Jump Board. TF-100. My Jan-Mar 2016 build:
    Waxahachie, TX Owner Build - A race to beat the baby!!

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    Murrieta, CA
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    Re: Help me pick the right sized pump please!

    If it's a new build, I would definitely go with the Intelliflo. That's what I put on my new pool build about 8 years ago, and I'm glad that I did.

    One thing to consider is that the Intelliflo is basically a 3 HP motor (with a 1.0 Service Factor). Most likely, you don't NEED 3 HP worth of flow, so you just scale back the speed. That means that the Intelliflo will spend almost all of its operating life at less than 50% of it's output. Motors last a LONG time when they are run at that low a percentage of their full rating. Amps=heat, and heat is the primary killer of motors.

    The superflo variable speed might be a decent compromise, but I think that the Permanent Magnet motor in the intelliflo is superior to the induction motor in the superflo. The Superflo VS is only a 1.5 HP motor, so you'll be running it higher in its power range more than you would with the Intelliflo.
    ~13500 gallon gunite pool, Pentair Intelliflo 4x160, Pentair 520 SF cartridge filter, Pentair MasterTemp 400 NG heater
    Pentair Easytouch with IC40 SWCG, Hayward Navigator on dedicated suction line

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    JamieP's Avatar
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    Re: Help me pick the right sized pump please!

    Thank you, Peter. I appreciate your insight. It helps a lot.
    28,000 gallon freeform, Stonescapes Tropics Blue Minipebble with abalone, 3.5' to 8.5' depth. 2 skimmers, 5 returns, dedicated vacuum port, Dolphin Z5 robot. All Pentair equip: EasyTouch 8, IC60 SWG, VS pump, 520 Cartridge Filter, 3 Intellibrites, 2 Color Cascade Bubblers. TurboTwister Slide and 8' Salt System Jump Board. TF-100. My Jan-Mar 2016 build:
    Waxahachie, TX Owner Build - A race to beat the baby!!

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