Pump running

Patrick McAneny

For over a month my water pump comes on for a second,every 15 minutes or so. I have not been able to find any leaks. I just thought of one possibility, a leak in a valve for flushing the membranes ,which is impossible to determine as the outlet is at the waterline. A second possible cause I was think of is the water pump,and this is my question.Can a water pump have an internal leak allowing water to flow back to the tank,thus reducing the pressure and kicking on the pump?
Christmas Cove,USVI

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