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Old 12-16-2012, 10:42 PM
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1idejim 1idejim is offline
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Join Date: Jul 2009
Location: State of Jefferson
Posts: 6,861
Did the pump always cycle? when it does cycle, what is a lot? I didn't say short cycle or fast cycle which are different issues.
You say with the pump off the pressure decreases. This would be due to a gradual loss of pressure as the pressure drops from cut-out to cut-in pressure. You ganged a set of valves to keep the pump running, you might of masked the problem, maybe not.

Clock the amount of time between cut-out and cut-in and the size of the drawdown of the pressure tank.

Calculate the demand requirements of the zone and if they don't jibe you may have a cracked pipe that opens and closes.
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