Where can plastic pipe be installed?

Plastic pipe can be installed in specific locations based on its intended use and the materials involved. The correct answer points to the fact that plastic pipe is generally allowed for outdoor and underground applications.

Outdoor installations include areas where the pipe is exposed to the elements, as long as the pipe is rated for such use. Additionally, underground installations are common for plastic pipes, especially in systems like gas and water transmission, where they are protected from physical damage and environmental factors. This versatility makes plastic an appealing option for certain applications, given its resistance to corrosion and relatively lightweight nature.

In many standards and codes related to fuel gas and plumbing systems, there are often specific guidelines that dictate where certain materials can be used based on their performance, safety, and long-term durability. While it is practical to use plastic pipe in both outdoor and underground systems, it is less suited for indoor above-grade installations where it may be subjected to conditions that could affect its performance, such as exposure to heat or mechanical damage from fixtures and appliances.