What type of plastic pipe is commonly used for underground gas lines?

High Density Polyethylene (HDPE) is commonly used for underground gas lines due to its excellent resistance to corrosion, chemicals, and environmental stressors. HDPE offers a high level of strength while remaining flexible enough to withstand ground movement, which is particularly important in shifted or unstable soil conditions. Its seamless nature helps prevent leaks, making it an ideal choice for applications where leak detection can be difficult, such as underground installations.

Additionally, HDPE is lightweight and easy to handle, which simplifies installation in various underground environments. The material's durability also means that it can last for decades without needing replacement, completing the cycle of reliability and safety when it comes to transporting gas. This makes HDPE a favored option among plumbing professionals for ensuring safe and long-lasting gas line installations.