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Thread: replacing intake pipe

  1. #1

    replacing intake pipe

    I have a dug well I've used for drip irrigation. It hasn't been used for years. The pump is shot. I decided to try replacing the pump, tank and intake pipe myself. I have a few basic questions.

    The well interior is 3 feet in diameter. It is beautifully cased in 5" thick concrete. The casing extends 4' above ground and 18' below ground. The water is around 4' - 5' deep right now, and it would drop a few feet this time of year in California if it were being used. There is a hole through the side of the casing for the intake pipes to run out to the pump. The pipe hole is about 3 feet above ground. So the distance from the pump intake to the water right now is about 14 - 15 feet.

    The well had an old Sears jet pump. I pulled the old intake pipes - PVC and steel. There were 2 and they were connected to a heavy brass jet? at the bottom. I'll replace the pipes with a single PVC pipe, because I picked up a Flotec jet pump a friend recommended, and it only needs one pipe.

    At the bottom of the well is a very fine sand. It seems like clay to me. You can form a ball with it. It compacts real well and the sand particles feel fine, but you do feel a grit between your fingers.

    So thanks for your patience and here are my questions!

    - The Flotec manual doesn't say if I should use a foot valve. Do I need one, or do I use a check valve?

    - It doesn't say how I should terminate the intake pipe at the bottom of the well. What do I put on the end of the pipe? Is the size of the sand particles a consideration?

    - Will the pipe and whatever is on the end just sit on the bottom or do I drive it some distance into the bottom?

    - The old PVC was sch 40. Is that what I should use as a replacement?

    Those are all my questions for now. Thanks in advance for any advice.

    Simon

  2. #2
    Pump guy speedbump's Avatar
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    Jun 2005
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    Murphy, NC. USA.
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    Hi Simon,

    First of all let me vent my hate for plastic pumps. There I feel better now.

    You can use 160, sch 40, poly, galvanized or what ever else you want. But it will need a footvalve at the bottom preferably a few inches above the silty bottom.

    Any (well most) shallow well jet pumps will lift water 25 feet maximum. Your entire well isn't that deep so I don't know why they had a deep well jet on there in the first place.

    So from the footvalve up you will have the drop pipe, one elbow and a fitting to screw into the pump's suction. That's it, prime it use it for a few years then go buy another one, cause that's how long they last. Sorry, I just hate plastic pumps.

    bob...


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  3. #3
    I apprciate the help. If I'd found you guys earlier I would have followed your advice about the pump. Next time...

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