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Thread: Pump sizing and selection - 16k gal AGP

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    JesseWV's Avatar
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    Pump sizing and selection - 16k gal AGP

    What would be the right size pump for a 16k gal AGP? The old pump is making a horrid whining/grinding noise and there is water trickling out of where the shaft enters the wet side.

    Does anyone have any recommendations on inexpensive but still reliable brands/models? (Seems like the Pentair Dynamo is pretty cheap.)
    16k gal, 28'x3.5', Vinyl A/G, 1hp Pentair Dynamo 2-speed Pump, Hayward S160T Sand Filter, Intermatic HB800RCL Digital Timer, Intex 8110 SWG, TF-100 Test Kit, SpeedStir Author: Jesse's Graphical Pool Testing Log

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    JesseWV's Avatar
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    Re: Pump sizing and selection - 16k gal AGP

    Also would it be a good idea to get a 2-speed pump if I'm going to be running a SWG?
    16k gal, 28'x3.5', Vinyl A/G, 1hp Pentair Dynamo 2-speed Pump, Hayward S160T Sand Filter, Intermatic HB800RCL Digital Timer, Intex 8110 SWG, TF-100 Test Kit, SpeedStir Author: Jesse's Graphical Pool Testing Log

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    Re: Pump sizing and selection - 16k gal AGP

    I'm looking for a pump right now, too.
    2 speed is what I'm going for. Running on low for circulation, high for cleaning only. Less energy, lower electricity bills!!
    12500 AGP 2HP Sand filter
    Five years on BBB & loving it!

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    mas985's Avatar
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    Re: Pump sizing and selection - 16k gal AGP

    The smallest 2-speed pump you can find is big enough. I think the Dynamo comes in a 3/4 HP two speed.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    JesseWV's Avatar
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    Re: Pump sizing and selection - 16k gal AGP

    Everywhere I look the 3/4hp 2-speed is at least $30 more expensive than the 1hp. Is this normal?

    Quote Originally Posted by mas985
    The smallest 2-speed pump you can find is big enough. I think the Dynamo comes in a 3/4 HP two speed.
    16k gal, 28'x3.5', Vinyl A/G, 1hp Pentair Dynamo 2-speed Pump, Hayward S160T Sand Filter, Intermatic HB800RCL Digital Timer, Intex 8110 SWG, TF-100 Test Kit, SpeedStir Author: Jesse's Graphical Pool Testing Log

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    mas985's Avatar
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    Re: Pump sizing and selection - 16k gal AGP

    The 3/4 HP two speed should be less than the 1 HP as shown here:

    http://www.inyopools.com/pumps_aboveground_pentair.aspx
    http://www.poolplaza.com/C-Dynamo.html
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    JesseWV's Avatar
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    Re: Pump sizing and selection - 16k gal AGP

    I'll check that out... I was looking at:

    http://www.amazon.com/Pentair-340204-St ... B002FQIYH8
    16k gal, 28'x3.5', Vinyl A/G, 1hp Pentair Dynamo 2-speed Pump, Hayward S160T Sand Filter, Intermatic HB800RCL Digital Timer, Intex 8110 SWG, TF-100 Test Kit, SpeedStir Author: Jesse's Graphical Pool Testing Log

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    mas985's Avatar
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    Re: Pump sizing and selection - 16k gal AGP

    The two pumps come from two different vendors so that is not surprising.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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