A water service line is typically a 3/4 inches or 1 inch diameter line that runs underground in your yard from the City water main, usually near the street, up to your meter pit, and from the meter pit into the plumbing system in your house. The portion of the service line from the water main up to the meter pit is owned by the City, and the portion of the line from the meter pit up to the house is part of the plumbing system of the home, and is owned by the homeowner or property owner. The City is responsible for maintaining and repairing the City's water main and the City's part of the water service line, and the customer or homeowner is responsible for maintaining the customer's part of the service line. Leaks in the service line past the meter pit will register on the meter, so prompt repair of any service line leak is a high priority.