Up here in Michigan I have a 2 inch. well that is 50 ft. deep with 20 foot of water in the pipe.
Have a drop pipe hooked up to a deep well system.
The well pumps good with a decent volume of waterBUT it will not shut off builts up to 30 plus pounds of pressure and stays there.
Tried a different pump and the same results.
Gage set at 20--40 with 18 lbs. of air in the tank.

Thinking it is the thing--is it a JET at the bottom ot the tail pipe.
Maybe a piece of shale or rust from the casing or drop pipe.

OR do I have a different problem. That part at the bottom of the drop pipe---are there better ones or are they all alike????
Thanks for any help.