For underground fill and vent pipes, which materials can be used?

The use of listed metallic materials for underground fill and vent pipes is essential due to their ability to withstand the specific conditions and requirements outlined in safety and regulatory standards. Listed metallic materials have been tested and approved for durability, corrosion resistance, and compatibility with fuel oil, making them suitable for the underground environment where they will be installed.

These materials help prevent leaks and ensure safe handling of fuel oils, as they provide adequate structural integrity under ground pressure and environmental conditions. Furthermore, using materials that are listed means they meet industry standards and regulations, which is crucial for compliance and safety in installations.

Although steel and high-density polyethylene can also be used in certain contexts, their acceptance may be subject to specific conditions that depend on local codes and standards. Brass is generally not recommended for underground applications due to potential corrosion and material fatigue over time. The emphasis on listed metallic options aligns with best practices in the industry, ensuring safety and reliability in the operation of underground fuel systems.