What type of pipe is typically used for residential gas distribution?

The correct response highlights that black iron pipe and polyethylene (PE) pipe are the commonly used materials for residential gas distribution systems. Black iron pipe has been traditionally used for natural gas and propane applications due to its strength and durability, providing the necessary sealing and structure to handle gas pressure. It is resistant to high temperatures and can withstand physical impacts.

Polyethylene pipe, on the other hand, is becoming increasingly popular for gas distribution because it is lightweight, flexible, and highly resistant to corrosion. It is particularly advantageous in underground installations, where it can be laid without the need for joints, reducing potential leak points.

Both black iron and polyethylene have specific advantages that make them suitable for different aspects of residential gas distribution: black iron for above-ground applications and PE for underground systems. This combination ensures safety, efficiency, and reliability in gas supply to homes.

The other options, while useful in different plumbing or construction contexts, are not suitable for gas distribution. PVC pipe, for instance, is not permitted for gas due to its combustibility and inability to handle the pressure of gas systems. Copper can be used in some gas applications, but it is not as common as black iron or polyethylene, especially not for large-scale residential distribution, and stainless steel, while