What is referred to as the gas piping from the supply main to an appliance?

The term that refers to the gas piping from the supply main to an appliance is known as the branch line. This piping is crucial, as it connects the gas supply that is typically provided via a main line to specific appliances such as furnaces, water heaters, or stoves within a building.

Branch lines are designed to support the distribution of gas where it is needed for various appliances and typically vary in diameter depending on the volume of gas they need to supply. Proper sizing and installation are key considerations to ensure that the appliances receive a sufficient gas flow for safe and efficient operation.

Other terms like main line, service line, and distribution line refer to different aspects of gas supply systems. For instance, the main line is the primary conduit running through a utility's distribution network. The service line is the portion of the gas system that connects the main line to the meter, while distribution lines generally refer to the larger system that carries gas from the main supply to a series of service connections. Understanding the specific role of branch lines helps clarify the overall structure of gas piping systems and their functionality.