The document discusses the components and installation process for natural gas services from the main distribution line to a customer's building. A typical service includes a service tee connecting to the main, a plastic or steel service line, a riser valve, regulator, meter, and connection to the customer's piping. The installation process involves planning based on the customer's gas needs, excavating a trench, installing the service components, pressure testing, and backfilling. Safety devices like excess flow valves may also be included to automatically shut off gas flow if the service line is damaged.

1. Installation of Services Service/service line: connects the customer’s piping to the gas distribution main Stub: portion of the service from the main in the street to the property line.