I have hydrant between the well and the barn. in the barn I have a cattle waterer with a inline control valve. it has a counterweight that pushes the button on the control valve to shut off when the bowl is full. if the bowl is full and I open up the hydrant, the waterer starts dripping till I close the hydrnt again. it will overflow the bowl. what would cause this pressure problem? if I close the hydrant part way, the drip at the waterer stops
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