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Thread: Pump Sizing/Selection Help Needed

  1. Back To Top    #1

    Join Date
    Jun 2014
    Location
    Bellingham, WA
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    6

    Pump Sizing/Selection Help Needed

    Hi Everyone,

    We bought a house with an existing above ground pool (specs in my signature). TFP has been a huge help in sorting out chemistry. Now our pump has died and I'm hoping you can help me choose a new one. I've read a number of great technical posts here but they're above my paygrade. I called the local pool stores and they were perfectly unhelpful. I haven't been able to sort out how to choose a pump from the dozens out there that will best match our filter and setup.

    We run our pool for about 4 months a year and have cheap power (~$0.10/kWh). I want an efficient setup but don't want to pay more than the efficiency is worth. I've read that slower pumping is best for filtering - how much flow do I need for vacuuming the pool? What size pump do I need to accomplish that? I have a 120V timing system in place and external strainer basket.

    Thanks in advance for your help!

    Dana
    18,000 gal above ground vinyl
    Pentair Sand Dollar SD60 sand filter - 60gpm - 2.3sqft

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    bobodaclown's Avatar
    Join Date
    Apr 2011
    Location
    Murrieta, CA
    Posts
    2,360

    Re: Pump Sizing/Selection Help Needed

    You can probally get away with in 3/4hp pump/motor combo. They even make them in 2-speeds. The motor has died, not necessarily the pump. You have a wet end (the pump) and the dry side (the electric motor). You can usually just replace the motor and save some money. Can you provide a model of the pump/motor or post a picture.
    Murrieta, CA. 15K (Est) pool/spa. Hayward Tristar SP3220EE 2.70HP pump, Hayward Swimclear Cartridge filter C4025 425sqft (PA106), Pentair Mastertemp 400 heater. TF-100/Speedstir

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    Join Date
    Jun 2014
    Location
    Bellingham, WA
    Posts
    6

    Re: Pump Sizing/Selection Help Needed

    Something broke inside the pump and the motor bearings were shot so I'm looking for a total replacement. I'd appreciate any thoughts on what pump would be appropriate for matching with our filter. Also wondering what flow rate I need for vacuuming.

    Thanks!

    Dana
    18,000 gal above ground vinyl
    Pentair Sand Dollar SD60 sand filter - 60gpm - 2.3sqft

  4. Back To Top    #4
    bobodaclown's Avatar
    Join Date
    Apr 2011
    Location
    Murrieta, CA
    Posts
    2,360

    Re: Pump Sizing/Selection Help Needed

    Hello Dana,
    How much would you like to spend?
    http://www.inyopools.com/Products/18...52Z4BtLPHw_wcB

    Their are probably cheaper and better recommended, but it was a quick search to give you an idea.

    Most of the time run it on low, energy savings, high speed when you need to vac.
    Murrieta, CA. 15K (Est) pool/spa. Hayward Tristar SP3220EE 2.70HP pump, Hayward Swimclear Cartridge filter C4025 425sqft (PA106), Pentair Mastertemp 400 heater. TF-100/Speedstir

  5. Back To Top    #5

    Join Date
    Jun 2014
    Location
    Bellingham, WA
    Posts
    6

    Re: Pump Sizing/Selection Help Needed

    Thanks bobdaclown.

    I've read on this forum the importance of matching a pump to a filter and pool. I can't find the specs for head loss on the SD60 filter. Without that I don't know how to ensure the pump will provide the right gpm for the filter. Can anyone help me pick a pump that's going to work well with our specific setup?

    Also, what minimum gpm do I need to run a vacuum?

    Thanks

    Dana
    18,000 gal above ground vinyl
    Pentair Sand Dollar SD60 sand filter - 60gpm - 2.3sqft

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