Where does the DOT jurisdictional piping end?

The correct choice indicates that the DOT (Department of Transportation) jurisdictional piping ends at the outlet fitting of the gas meter. This placement is significant for several reasons.

Firstly, the DOT is responsible for regulating pipelines that transport gas from the point of origin to the point where the gas enters a customer’s premises. The outlet fitting of the gas meter marks this transition point, where the utility's responsibility ends and the customer's responsibility begins. Essentially, this measurement defines the boundary for regulatory oversight concerning safety standards related to transportation pipelines.

Understanding this boundary is crucial for both safety inspections and compliance with legal requirements. When inspectors assess gas piping systems, they focus on the segments that fall under DOT regulations up to the meter, ensuring that any potential hazards or leaks upstream of this point are adequately addressed. However, any piping beyond this point, such as that leading to appliances within the building, falls under different jurisdiction, typically a local or state authority that governs internal plumbing and appliance installation.

This comprehension of jurisdictional limits helps in maintaining a clear understanding of responsibilities and safety along the gas delivery system, ensuring that gas systems operate safely from the source to the point of consumption.