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Thread: Please help me select a pump

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    Please help me select a pump

    I am about to install a 21'X41' X 54" oval AGP. I am sinking, but not back filling, pool. I need a self priming, 2 speed agp pump that will work with my size pool and a 22" sand filter. I plan on placing the pump and filter about 30'-40' from pool. Thanks in advance.
    21' x 41' Oval AGP for all 9 kids and wife 1 Skimmer, 2 returns, 22" sand filter, Pentair Dynapro 1.5 HP 2 speed pump. Compupool CPSC 36 SWCG.

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    Mod Squad Bama Rambler's Avatar
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    Re: Please help me select a pump

    How far are you lowering the pool? All the way to the top rail?

    If the water line is above the pump suction even a little you don't need a self priming pump.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Re: Please help me select a pump

    The filter and pump will be above or right at the water line. I am not done leveling the hole yet, so I am not positive on the water height compared to pump. I would rather be safe and get the self priming pump now instead of finding out later that I need one.
    Thanks.
    21' x 41' Oval AGP for all 9 kids and wife 1 Skimmer, 2 returns, 22" sand filter, Pentair Dynapro 1.5 HP 2 speed pump. Compupool CPSC 36 SWCG.

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    JasonLion's Avatar
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    Re: Please help me select a pump

    Perhaps something like the Pentair Dynamo 3/4 HP two speed, DYNII-N2-3/4 HP, or the 1 HP two speed, DYNII-N2 1 HP. These are both medium head pump that are capable of priming relatively small distances above water level (a couple of feet).
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Mod Squad zea3's Avatar
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    Re: Please help me select a pump

    You may want to consider a larger filter. According to The Pool Calculator the volume of your pool will be around 25,700 gallons. You may want to look at a 1 hp 2 speed pump and the largest sand filter that will fit your budget. A larger filter will go longer between cleanings and provide better filtration than a small filter with a big pump.

    Are you planning to add any other features to the pool, such as solar panels, heaters, salt water chlorine generators, ect?
    TFP Moderator
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    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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    Re: Please help me select a pump

    I might be adding a SWG next year, but not sure yet. I also am planning some water features in the future (slide, fountain, etc.)
    21' x 41' Oval AGP for all 9 kids and wife 1 Skimmer, 2 returns, 22" sand filter, Pentair Dynapro 1.5 HP 2 speed pump. Compupool CPSC 36 SWCG.

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