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Thread: Matching pump h.p. to well point size and length?

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  1. #1
    DIY Member ron in sc's Avatar
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    Question Matching pump h.p. to well point size and length?

    Do I need to match a new well (shallow well, 20ft.) to a particular horsepower pump motor?

    The well point is 2" diameter and the screen part is 5 ft. I don't know the water output yet. I did hook it up to a 2" gas powered trash pump to see what I'd get in the way of sediment and the like. Really no sediment just clear water.

    How many hp pump should I get?

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    You need to use a five gallon bucket and do a test with the use of the trash pump to see how many gallons per minute this well will produce. Then we can size a pump.

    bob...

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    DIY Member ron in sc's Avatar
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    You need to use a five gallon bucket and do a test
    I don't have the trash pump anymore. I rented it for a day to use if a couple of foundations I had dug flooded due to heavy rain.

    I donít know if this is any help or not but I have one of those 1 1/4" PVC well points with a 4 ft. screen on the other side of the house. It puts out 6 gallons per minute at with a Myers 3/4 hp. Model #HJ75S, attached to a Wellsaver tank model #LPT7H

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    I would think if these wells are identical, you can expect to get the same from both.

    bob...

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    DIY Member ron in sc's Avatar
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    They are not exactly identical since the new one has a 2" pipe that has a 2" well point with a 5' long screen as oppose to the other one which is an 1 1/4 pipe that has an 1 1/4" screen that is 4' long.

  6. #6
    Previous member sammyhydro11's Avatar
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    Ron,
    after every well is installed the well needs to have a 4 hour pump test performed in order to determine its yield. It would be unwise to assume that one well produces the same amount of water than the other. Correct me if I'm wrong but i thought we have been through this before. Isn't the well in the basement and you couldn't use the gas pump inside because of the exhaust but if you pumped it from the outside the extra height in elevation would prevent the pump from working?? You need to rent an electric jet pump and perform a pump test to determine the yield then you size your pump and the demand based on those results .

    SAM

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