Gas line refers to a pipe that connects a structure or residence to the mains gas supply or gas tank. However, there are various terms used interchangeably to refer to gas lines such as gas pipes, gas mains, gas pipelines, natural gas lines, gas ducts, and fuel conduits. The specific term used may vary depending on the context and the location. It is crucial to understand that gas lines are important and need to be appropriately installed and maintained to prevent any gas-related accidents. Therefore, regular maintenance and inspection of gas lines are necessary to ensure the safety and efficiency of the gas supply.