New well. Looking for advice

Discussion in 'Pumps and Tanks Well Forum & Blog. Water is life.' started by willtcam, Jun 4, 2020.

  1. willtcam

    willtcam New Member

    Joined:
    Jun 4, 2020
    Location:
    Texas
    I have a new water well that was just drilled. Makes about 5GPM has a 10gpm pump.
    I have been told that it is bad to pump it empty because it will draw in sediment. I have also been told it is better to pump it completely down so it can open up more. Looking for more input. Thanks!
     
  2. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Running the pump empty during "development" is fine, but you should then shut down the pump for an interval to recover. This could be done by device to detect that you pumped the well down, or by a person monitoring.

    Tell us about the well.
    1. Diameter?
    2. how deep is the well?
    3. casing goes down how far?
    4. is there a screen in the sides of the casing to admit water and filter out sand?
    5. pump is set how deep?
    6. if you know, what pump was installed?
    I suggest you put the info that you know in a good place. A good place would be on the wall near the pressure tank, if the pressure tank is indoors.
     
    Last edited: Jun 4, 2020
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  4. willtcam

    willtcam New Member

    Joined:
    Jun 4, 2020
    Location:
    Texas
    5” casing, I believe it is cased the entire depth of the hole. 98’ feet deep. Not sure how much casing is screened vs not. Grundfos 1/2 pump not sure on the depth that it is placed. I have installed a cycle sensor to stop it from running dry. I do not have a pressure tank installed since it will only be used for watering the lawn.

    how long should I continue the process of running the well completely dry then allowing it to recharge?
     
    Last edited: Jun 4, 2020
  5. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Maybe put a tub under where the water spills out. Does the tub still catch sediment?

    How long does it take to run dry?
     
    Last edited: Jun 4, 2020
  6. valveman

    valveman Cary Austin Staff Member

    Joined:
    Mar 15, 2006
    Occupation:
    Pump Controls Technician
    Location:
    Lubbock, Texas
    If that is causing it to make sand, keep doing it for a while. You might pump out enough sand to increase the well production. Pumping out as much sand as possible is a good thing all by itself. If it just keeps making sand, and doesn't when restricted to a certain amount, then you should adjust your irrigation to that amount of flow. If you only put 5 GPM worth of sprinklers on a line, then the pump can only pump 5 GPM. However, when restricting the flow with sprinklers the pressure will increase. It is ok for the pressure to increase and for the sprinklers to run at higher pressure unless they are spraying too far or fogging instead of supplying large droplets of water. You can always add a CSV to hold the pressure steady down to 1 GPM flow, and the CSV will work with or without a pressure tank.
     
  7. willtcam

    willtcam New Member

    Joined:
    Jun 4, 2020
    Location:
    Texas
    It takes about 25 minutes running with nothing restricting the output to completely run dry. At about 20 minutes The water starts turning red/brownish. If I run it continues at 5GPM the water will stay clear.
     
  8. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    The Cycle Sensor does not then shut down the pump for a while?
     
  9. willtcam

    willtcam New Member

    Joined:
    Jun 4, 2020
    Location:
    Texas
    I have it set turn turn off for 20 minutes and then turn back on.
     
    valveman likes this.
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