Main Water Line Leak, Main Water line, Fix Leak, Leaking Main Water Line, repair water line, repair water line leak, water line leakMock Plumbing repaired a main water line leak. As shown here, there was a leak at the fitting that has been screwed into the water meter. The local water company usually provides a threaded connection to connect the line into the meter. However, the responsibility falls with the home owner if a leak occurs at that fitting or on the house side of the fitting.