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Tool Talk Discussion Forum

OT WELL QUESTION

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lenray

09-16-2004 18:54:37




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Just put down a new point--screen--in one of my rental wells. It is a driven inch and a quarter pipe with a 4 ft. screen 40 ft. deep with a standing water level down only 10ft. While using all the water they can run the pump will catch up and shut off while they are running water.
The question the renter has is that he thinks the pump shouldn't shut off while they are using water. And because it shuts off and restarts at 20 and stops at 40 they get a small drop off in pressure when it nears 20 that they wouldn't get if the pump would just continue to run and say hold a pressure of 30 plus.
Thanks for any help. Maybe I need a larger pressure tank am using one of those blue ones with a bladder and it is on the small side as it is inclosed in a little house for winter protection.

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Paul Janke

09-17-2004 16:38:50




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 Re: OT WELL QUESTION in reply to lenray, 09-16-2004 18:54:37  
My renter is a pump service man. The well services his house and mine. The pressure tank is at my house, but both houses have their own line from the well, so when the pump is not running, the water has to go from my house to the well, and then to his house. He objected to the pressure drop, so he put in a stop-cycle valve. After the pump starts, it won't let the pressure climb high enough to shut off the pump until the flow rate is quite low. Ultimately, it's easier on the pump because starting is what wears out the pump. I think the valve is about $40, but he furnished and installed it. He's a good renter to have, hope to keep him.

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paul

09-17-2004 08:50:44




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 Re: OT WELL QUESTION in reply to lenray, 09-16-2004 18:54:37  
Yea, things are working right with what you have. Getting a different pressure switch with higher settings will help, 20 is quite low.

A bigger tank will help you - the pump lasts longer if it doesn't have to start so often.

--->Paul



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david - or

09-17-2004 07:38:28




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 Re: OT WELL QUESTION in reply to lenray, 09-16-2004 18:54:37  
A larger pressure tank will make the "problem" worse, not better. Let's say the pressure is parked at 40 psi and the renter starts taking a shower. The pressure will drop as the tank discharges. Let us suppose the renter starts to notice as the pressure gets below 30 psi. The bigger the tank, the more time it will spend in the region between 30 psi and the "cut in" pressure of 20 psi, and the more objectionable it will be.

There are various gadgets like "stop cycle valves" and constant pressure pump controllers. But I would say your main problem is that 20/40 setting. With a low min pressure, and a 2x difference between high and low, it will be enough to notice. I think I'd complain too -- 20 psi is awfully low and there's no reason for it.

I set my pump pressure switches for 40/60. It takes just a few minutes with a crescent wrench to adjust. Higher pressures sometimes drive the need for a bigger pressure tank in order to meet the minimum run time for the pump (one minute for 1 hp and smaller, two minutes for larger).

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SteveB(wi)

09-17-2004 06:33:14




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 Re: OT WELL QUESTION in reply to lenray, 09-16-2004 18:54:37  
Tell him you'll get the water how he likes it but you'll make the rent how you like it.



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RWK in WI

09-17-2004 06:22:20




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 Re: OT WELL QUESTION in reply to lenray, 09-16-2004 18:54:37  
On most pumps you can reset the preasure for a higher pressure. At 30 cut in 50 cut off the pump will run longer to create the higher pressure and when it gets down to the 30 it won"t be as noticable. It might be worth a try to see if they like it better.



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Rockin' Farmer

09-17-2004 04:32:31




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 Re: OT WELL QUESTION in reply to lenray, 09-16-2004 18:54:37  
Lenray,

You might want to try to put a valve between the pump and the pressure tank (in front of the pressure switch) to slow down the flow of water a little. That will keep the pump from "catching up" so quickly. Just had about $8,000 worth of new well work done, and the well guy did that here to insure that the pump would run at least a minute every time it kicked on. No noticeable drop in pressure. Old system (deep well jet pump) would drop off, but that was because the pump couldn't keep up with demand.

.02 worth.

Rockin' Farmer

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TheRealRon

09-17-2004 03:42:41




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 Re: OT WELL QUESTION in reply to lenray, 09-16-2004 18:54:37  
In a proper system there should be no noticable difference in pressure at the point of use. However, your pump and tank are operating correctly. Most likely the piping from the tank to the point of use is either undersize or has some build-up in it. Nothing to worry about. He will tire of "using all the water he can run" and get over it.



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Coloken

09-17-2004 01:53:48




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 Re: OT WELL QUESTION in reply to lenray, 09-16-2004 18:54:37  
Like others say..this is normal. I am guessing maybe on a lawn sprinkler? Turn on another outlet or drill out the nozzel just a bit till it takes all the pump can put out.



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Leland

09-16-2004 19:52:07




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 Re: OT WELL QUESTION in reply to lenray, 09-16-2004 18:54:37  
I have a 20-40 pump and tank mine does the same thing,if it ain't broke don't fix it. the flow of water at 40psi will not be the same at 20psi.



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quigley

09-17-2004 09:47:00




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 Re: OT WELL QUESTION in reply to Leland, 09-16-2004 19:52:07  
this is normal,you can increase the psi but your pump will run longer and harder.Ihave set pumps diffence ways you do't want to burn up your pump you did't say if it sub or jet. [cityboys should not live in the country my 2 cents]



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Dave_D

09-17-2004 11:46:47




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 Re: OT WELL QUESTION in reply to quigley, 09-17-2004 09:47:00  
I use 20/40 pressure switches for my drip irrigation pumps (Vineyard) and 30/50 for my home water pump.

You can get a new pressure swith from ebay for $10 or so. I have bought a couple from the following link.



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