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Tool Talk Discussion Forum

Another Well/Pump Question

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GreenAchesPains

12-20-2005 15:45:18




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I have a jet pump, not sure how deep the well is but it's set up for a deep well (foot valve at the bottom, etc). It seems to me that the pressure switch is set too high, it cuts in around 80psi and cuts off around 95psi (was that way when I bought the place and has been that way for several years). Is that out of range? It's possible the previous owner set it; he was kind of a special case, if you know what I mean...

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GreenAchesPains

12-21-2005 11:18:48




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 Re: Another Well/Pump Question in reply to GreenAchesPains, 12-20-2005 15:45:18  
Bus Driver and Russ Smart were correct. The gauge was way wrong. After I took it off and was holding it in my hand it read 60lbs.

Replaced the gauge, charged the tank to 28lbs of air pressure and set the switch to 30/50. It seemed to have trouble getting the last few pounds in so I backed the cut-out to 46lbs. Everything seems good now, although I might lower the cut-in pressure a few pounds when I have a helper to observe the shower at the lower pressure. A $5 fix, gotta love it :^)

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jdemaris

12-20-2005 17:13:46




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 Re: Another Well/Pump Question in reply to GreenAchesPains, 12-20-2005 15:45:18  
I don't think a jet pump could ever generate that kind of pressure. I'm not sure what you're calling a deep-well setup. A true deep-well setup would have the actual jet down in the well, not bolted to the pump - and there would be two pipes going down the well instead of one. A shallow-well jet pump is usually maxed out at 20 feet depth at which it can barely generate 50 PSI. A deep-well jet setup can work to over a 100 feet depth, but it becomes very inefficent past 80 feet. Depending on your water-head (depth from which you are pumping, not well hole depth), 30/50 would probably be your max. settings - but due to the increased inefficiencly at higher pressures - 20/40 is probably more like it. The reality is, if the head is more than 20 feet - a submerged pump would pay for itself in saved electicity in a short time - as compared to using a jet pump.

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John A.

12-20-2005 16:37:19




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 Re: Another Well/Pump Question in reply to GreenAchesPains, 12-20-2005 15:45:18  
G.A.P., Set a new Gould 1hp at my place yesterday. pressure set points are on at 30 psi
off at 50 psi
Mine is not doing any Lift, it is the pressure generator for the house. Windmill dumps into a 6000 gal storage and then travels in 1+1/4 black roll polly pipe, 500 ft, gravity feed to the pump them onto the house.
Later,
John A.



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Tim23

12-20-2005 16:13:41




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 Re: Another Well/Pump Question in reply to GreenAchesPains, 12-20-2005 15:45:18  
Most pump switches I've seen are either 20/40 or 30/60 psi. I've not seen one with pressures that high.



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Bus Driver

12-20-2005 16:11:19




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 Re: Another Well/Pump Question in reply to GreenAchesPains, 12-20-2005 15:45:18  
Do verify with a trusted gauge. Single stage jet pumps are very inefficient at pressures above 50 PSI. They run a long time and use a lot of electricity to develop the extra pressure.



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Russ Smart

12-20-2005 15:59:27




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 Re: Another Well/Pump Question in reply to GreenAchesPains, 12-20-2005 15:45:18  
Are you sure your gauge is right? most pumps won't develop that much pressure.



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