Recently I turn off my main water valve inside my house prior to my vacation for 5 days. When I came back from the trip the water company informed me that I had a leak coming from my main water line, 2 to 4 gallons per hour during those 5 days that I was away. Yet, that issue went away as soon as I came back and turn on the main water value inside the house. I also had a plumber check the main water value outside for leaks and he could not find any leaks. What do you think is happening?
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