Where does a service line end?

The service line ends at the outlet side of the gas meter because this is the point where the gas begins to transition from the utility's responsibility to the customer's equipment. The service line is responsible for delivering gas to the meter, which measures consumption for billing purposes.

Once the gas passes through the meter, it enters the customer's system for use in appliances, heating, or other applications. This demarcation is crucial because it defines the boundary of responsibility; the utility is responsible for the gas supply up to the meter, while homeowners or businesses are responsible for everything downstream of the meter. Understanding where the service line concludes helps ensure proper inspection, maintenance, and adherence to safety regulations.

Other options describe locations that are not accurate demarcations of where the service line ends. The main gas supply source refers to the gas distribution system, while the customer's residence and the safety shut-off valve relate to different stages of gas delivery and safety rather than defining the service line's endpoint.