True or False: Plastic gas line piping shall be installed outside and underground only.

The assertion that plastic gas line piping shall be installed outside and underground only is true because of safety and regulatory considerations. Plastic gas lines, typically made from materials like polyethylene, are designed for specific applications that prioritize safety and minimize the risk of leaks or damage.

When installed underground and outside, they are protected from potential impacts, temperature fluctuations, and direct sunlight that could degrade the material over time. Additionally, underground installations help prevent accidental damage from surface activities, such as construction or landscaping, which could compromise the integrity of the piping.

Building codes and standards, such as those from the National Fuel Gas Code (NFPA 54) or similar regulations in various jurisdictions, further reinforce the requirement to keep these installations outside and underground to ensure safe operation.