Have a deep well 300 ft with a Gould 5ES submersible 1/2 horse 3 wire pump. I noticed the pump coming on and off occasionally even with no water use. This has been going on for quite some time and seemsed to be getting worse. Since the pressure tank, gauge and pressure switch were all coroded and leaking I decided to replace them all. I did find the check valve near the pressure tank leaking back and also the pressure tank defective also. My fear was the bad check valve may have been masking a bigger problem and it was. When the pump is not running the water bleeds back down and takes a some time to pump up again. With the defective check valve the pump would run every so often and mask the problem. My question is how can I check if I have a well pump, drop line or other leak back to the pump. Does the pump itself also have a check valve. I dont see any wet spots out in the yard leading to the well.
Appreciate any help before I called the Well people.