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Thread: Driven Well-Too much success! how do I proceed?

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  1. #1

    Default Driven Well-Too much success! how do I proceed?

    Thanks for all the tips guys!
    I live in very low very flat Eastern Shore Maryland. Average rain from May 1st to today should be 4 or 5 inches....we've had 8 inches in that time.

    I put a 1 1/4 x 36" well point down plus a 64 inch length of pipe added.
    With 22 inches stuck out of the ground I reached a pretty tough firm piece of ground down there. So I looked down the pipe and there was water.

    I have 52 inches of water in the pipe, topped out at 22" inches below the surface. How do I proceed, or monitor this situation? If I wanted to pump it out to water a very large garden, how do I determine the proper pump, and gallons per hour capability.
    I'm dumbfounded. Plus I have 3 more sections of 5' pipe!

  2. #2
    DIY scratch-pad engineer leejosepho's Avatar
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    First: If you live anywhere near a farm or commercial facility of any kind, you might want to check that water before using it for much of anything, and especially before ever drinking any of it. Here where I happen to live, water that close to the surface would almost certainly be polluted in some way.

    Quote Originally Posted by stevenb View Post
    I have 52 inches of water in the pipe, topped out at 22" inches below the surface. How do I proceed, or monitor this situation? If I wanted to pump it out to water a very large garden, how do I determine the proper pump, and gallons per hour capability.
    I would rent a small (1-1/2" or 2") trash pump to develop the well and see what happens. Use some kind of valve (or some clamping pliers) on the end of the discharge hose to get a restricted flow that will fill a 5-gallon pail in about 30 seconds, and if the water keeps coming at that rate until the fuel tank on the pump runs dry, you could assume a flow rate of at least 10 gallons per minute for as long as the overall water table remains as at present.

  3. #3

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    I'm only going to use the water for the vegetables, fruit trees, and lawn....but that's a good point to check it anyway since it's so shallow.

    I have a Wayne 1/2 HP Self-Priming Portable Utility Pump (1450 GPH)...but I'm afraid it will run water out of the pipe faster than the water can replace. This is just ignorant assumption, I have absolutely no experience in any of this.

    Do I need to get some kind of bladder pump with pressure switch so I can go on and off with the garden water gun?

    Thanks!

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    DIY scratch-pad engineer leejosepho's Avatar
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    Quote Originally Posted by stevenb View Post
    I have a Wayne 1/2 HP Self-Priming Portable Utility Pump (1450 GPH)...but I'm afraid it will run water out of the pipe faster than the water can replace ...
    1450 / 60 = 24 gpm / 2 = about what you are looking for

    As long as there is enough flow to keep from burning something up, it will not hurt a pump to restrict its flow. So, put some kind of controllable restriction on the discharge of that pump and do a test at 10 gpm to see whether the well can keep up.

    Quote Originally Posted by stevenb View Post
    Do I need to get some kind of bladder pump with pressure switch so I can go on and off with the garden water gun?
    If garden watering is all you are doing, I would probably use a small bladder tank and something like a CRV (a Continuous Run Valve or Cycle Stop Valve (CSV) from Valveman) so the pump would run continually while you are watering. Continuous (and even restricted) running is good -- continual stopping and starting is bad. Or, and if you know precisely how much flow you need at a given pressure, maybe some of the pros here can help you size the pump so it will run continually and wide open while you are watering.

  5. #5
    In the Trades Bob NH's Avatar
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    A 1/2 HP utility pump that delivers 1450 gallons per hour probably has too little head to give satisfactory operation with a sprinkler. I suspect that it is limited to 15 to 20 psi at 24 GPM. Try it and see what you get.

    I would connect it to a sprinkler or hose that would never be completely shut off. Forget the pressure switch and forget the the tank.

    If you want more pressure get a jet pump, which will deliver more pressure but less flow.

  6. #6

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    Depending on where you are on the eastern shore, you may have run into a clay layer. On the upper eastern shore along the bay, you will run into layers of red or grey clay. As you move south more sand.

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