Final answer:
The correct answer is option 1) Service line. This is the piping installed by the gas supplier from the main gas line to the customer's system.
Step-by-step explanation:
The correct answer is option 1) Service line. The piping and equipment that are installed and maintained by the gas supplier, which run between the main gas line in the street and the gas meter or point of entrance to a user's system, are known as the service line. This is distinct from the distribution line, which refers to the larger network pipes that distribute gas throughout a locality, and the transmission lines, which are high-pressure lines that transport gas from production facilities to distribution centers. Lastly, the term 'supply line' is less specific and could refer to various kinds of gas delivery infrastructure, but it is not the term specifically used in the code to describe the pipeline running to an individual customer's premises
.According to the provided information, the piping and equipment between the street gas main and the gas piping system inlet, which is installed by and is under the control and maintenance of the serving gas supplier, is referred to as the service line.This service line is responsible for delivering the gas from the street gas main to the customer's gas piping system inlet.