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Old 03-14-2016, 09:32 AM   #1
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Help with an old point well


Hello, i'm a new forum member looking for some advice on reviving an old Driven Point well.

About a year ago i purchased a lake house, With an old 20x40 garage about 30 feet off the shore line. There is an old Driven point well in the corner of the garage, that hasn't been in use for 20-30 years. I'd really like to get water in the garage for pressure washing cars/boats, washing hands and the likes. I'm not concerned if its potable water.

This weekend i uncapped the well, and fished a 25 foot section of some old romex down the well. I hit water about 10 feet down the pipe. I fed the other 15 feet of the wire down and never hit bottom, so i don't know how deep the well is, but there appears to be plenty of water down there.

So my plan is to purchase an inexpensive 1hp shallow well pump from harbor freight and install a Foot valve to prevent loss of pressure/priming issues. The well pipe is only 1 1/2" in diameter. Should i use a 3/4" or 1" foot valve? How far down the well should i install the foot valve?

I'm by no means a plumber, so i home i'm on the correct path here. Thanks in advance for you help

-Mike
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Old 03-14-2016, 10:24 AM   #2
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Re: Help with an old point well


Suction limit on that type pump is 25'. Use the largest foot valve and pipe that will easily go into the casing.
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Old 03-14-2016, 10:40 AM   #3
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Re: Help with an old point well


the pump im looking at is a 1"inlet/outlet, so i should go with a 1" foot valve as long as i can snake it down the 1 1/2"casing? Should i install it as far down the well as possible without exceeding the 25 foot suction limit?
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Old 03-14-2016, 10:42 AM   #4
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Re: Help with an old point well


Yes, 25'.
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Old 03-14-2016, 10:49 AM   #5
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Re: Help with an old point well


Great, thanks for your help, much appreciated.
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Old 03-14-2016, 11:43 AM   #6
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Re: Help with an old point well


If that thing is a driven point as you describe in the title, the pump is meant to attach directly to the pipe. It is not meant to be used a casing. I'm not sure the screen will supply enough water used as you intend. I have never seen it done like that.
Also 1hp is way more than you need. 1/2 or 1/3 should be fine.
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Old 03-14-2016, 01:00 PM   #7
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Re: Help with an old point well


yes it's definitely a driven point. i was planning on attaching the foot valve to a 20ft section of black plastic pipe and dropping that down the well pipe, and plumbing it into the inlet of the pump. The pump will sit very close to the pipe, but won't be mounted directly to it. I'm not sure how i would install the foot valve and still be able to plumb the pump directly to the top of the well pipe. Am i missing something?

I can step down to a 3/4hp pump and save a few dollars if 1hp is overkill, but its only a $25 difference, and the pumps are rated exactly the same. Also, if the well pipe is only 1 1/2" I.D. i may have to step down to a 3/4" foot valve if i can't get the 1" to fit in the pipe.
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Old 03-14-2016, 01:44 PM   #8
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Re: Help with an old point well


a driven well is designed to use the casing pipe as the water pipe to the pump, to suck the water out of the ground( water aquifer), not like a submersible pump that the casing is a reservoir for the water as it seeps back in..you will get a few gallons and then it will be dry till it slowly seeps back in..
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Old 03-14-2016, 03:14 PM   #9
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Re: Help with an old point well


OK. I can plumb the pump directly into the well casing pipe, that's not very difficult. What i don't understand is how i would install a foot valve down inside of the casing, while still plumbing it in with the pump, since the pump will be attached at the top of the well pipe. Do i need to install a foot valve, or just hook suction side of the pump directly to the casing?

An old timer i know told me to install a foot valve, i understand the principal and how they operate, i just don't see how it's installed with this application, or if its even necessary.

Sorry if i'm making this overly complicated. I have a feeling this is much more simple than i'm making it out to be in my head.
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Old 03-14-2016, 03:28 PM   #10
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Re: Help with an old point well


you can use a check valve to keep the prime in the pump,,here is a link to explain better with a diagram..it shows both ways..
http://www.pentairpool.com/pdfs/Shal...ystemHN-OM.pdf
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Old 03-14-2016, 04:24 PM   #11
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Re: Help with an old point well


Thank you for posting that link, The diagrams were very helpful. So it appears that a foot valve is not the correct application in a driven point. I should be installing a check valve between the end of the pipe and the well pump. Seems pretty simple and straight forward once i saw a picture. Thanks again
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Old 03-14-2016, 04:51 PM   #12
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Re: Help with an old point well


Quote:
Originally Posted by mboor View Post
Thank you for posting that link, The diagrams were very helpful. So it appears that a foot valve is not the correct application in a driven point. I should be installing a check valve between the end of the pipe and the well pump. Seems pretty simple and straight forward once i saw a picture. Thanks again
hope it works out for you...
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Old 03-14-2016, 06:47 PM   #13
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Re: Help with an old point well


Are you sure there is not an inline check valve on the pipe now? I would just install a check valve in line at the point the pipe exits the ground.
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Old 03-15-2016, 06:25 AM   #14
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Re: Help with an old point well


Jet pump
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