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While this story will not help the original poster's question I think it does confirm the possibility that a leak in the pipe in the top of the well above the water line could very well exist. We have a community well that is engineered with a built in leak on purpose for this very reason, to push air into the tank (a 1500 gal pressure tank, NOT a bladder type). The tank always needed to have the air head charge on it replenished. One of the neighbors used to take his portable air compressor to the well and put it on for an hour or two to accomplish this. We looked into the float type systems to maintain an air head with a permanent mounted compressor, but this was expensive and required maintenance. Finally a local well man told us what he does. At the first pipe joint down (21 ft) he places a T instead of a coupling and puts a rubber plug in the side of the T that has a small hole in it. At the top of the well outside, is another T instead of an elbow and in the top of the T is a tire type schrader valve with no cap. When the pump shuts off, the schrader lets air in the pipe as the water drains out thru the small hole in the rubber plug. When the pump starts up, it pushes a 21 ft column of air up the 1-1/2" pipe and into the tank. The hole is an insignificant leak for a 5 horse pump and the air is constantly replenished and the tank never needs air added and does not become waterlogged. Charles
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