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Thread: Is this pump to large

  1. #1
    DIY Junior Member 85ray's Avatar
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    Default Is this pump to large

    I just purchased some land with a well but no pump had the well flow tested at 22gpm the well is 343' deep static is 241' the well outfit gave me 3 pump options Gould's 2 HP 10 gpm, Gould's 3 HP 13 gpm, or Gould's 3 HP 18 gpm. All with 1 1/4 sced 120 pipe. So I want to get aslant gallons a min with out hurting the well and I read in one place that 1 1/4 pipe is only rated at 2 HP is this true and on the flow charts it shows the 18 gpm would over draw the well but at 0 psi will I ever get to 0 psi I plan on building a 4 bedroom 2 1/2 bath house with bath in shop and garden and watering some grass I am super confused astronomy to wich pump and what pipe to get

  2. #2
    Moderator valveman's Avatar
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    Do you know the pumping level while they were getting 22 GPM? Because if it didn't pull down much below 241', the 2 HP, 18 GPM will work. But if it pulled down close to 340', you would need the 3 HP to get the 18 GPM, or the 2 HP, 10 GPM will get about 13 GPM. The 1 1/4" pipe is fine.

  3. #3
    DIY Junior Member 85ray's Avatar
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    The logged started at 241' and 13 gpm and in 15 minutes it stoked to 248' and 22 gpm and pretty much stayed at 248' for another 1 hr and 40 minutes

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    Moderator valveman's Avatar
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    Since the pumping level doesn't pull down more than 248', the 13GS20 will get you 15 GPM.

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