Re: Water Well Problems 2

Posted by Gary Schafer on December 25, 2005 at 09:01:05 from (71.57.149.211):

In Reply to: Water Well Problems 2 posted by john in la on December 25, 2005 at 06:56:11:

Hi John,

You didn't say what type well you have. Is it a sand point driven down? If so then you can't use a foot valve on it. The foot valve would break as you tried to drive the point.
The check valve at the top should work fine if you have no air leaks in the well pipe above the water table.

Your intake line from the well to the pump should not make a loop above the pump and down again. Air can get trapped in the loop. The best way is to come off the well with a 90 and go straight over to the pump.

If your check valve is leaking then the tank will drain down over a period of time but the pump will still maintain its prime and start ok as long as the tank doesn't go empty on you. Once all the water leaks down then it will also loose its prime.

If the tank is not leaking down but the pump is loosing its prime then you have a leak between the check valve and the well.
Did you change the point or well pipe recently?

Another problem may be the amount of lift you have from the pump to the house. You mentioned 220 feet. Is that horizontal or is part of that vertical lift? If you have a large vertical lift then the water in that pipe will provide back pressure and may be enough to not allow the pump outlet pressure to drop low enough to turn on. If so then you would need to change the pressure switch setting.

Prime the pump, get it working and watch the gauge to see where the pump starts and stops as water is run. Then turn off the power to the pump and open a faucet at the house and watch the pressure gauge to see how low it goes when there is no more water coming at the house faucet. That will tell you how much back pressure you have in the water line from vertical lift.

Regards
Gary

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