Which type of pipe material allows for flexibility in distribution systems?

PVC, or polyvinyl chloride, is a type of plastic that is widely used in distribution systems due to its inherent flexibility. This flexibility allows PVC pipes to withstand ground movement and changes in temperature without cracking or breaking, making it an ideal choice for various applications in plumbing and drainage systems.

In addition to its flexibility, PVC is lightweight, which simplifies transportation and installation. It is also resistant to corrosion and chemicals, further enhancing its usefulness in a variety of environments. These characteristics contribute to the adaptability of PVC in dynamic conditions, ensuring that it can accommodate shifts due to soil settlement or other environmental factors.

Other materials, such as ductile iron, galvanized steel, and concrete, are typically more rigid and do not provide the same level of flexibility. Ductile iron can withstand high pressures but lacks the pliability associated with PVC. Galvanized steel, while strong, is prone to corrosion and is also not flexible, making it less suitable for systems that require adaptability. Concrete is durable and strong, but its rigidity makes it incapable of adjusting to movements or stresses in the ground, which can lead to cracking.

Thus, the combination of flexibility, light weight, corrosion resistance, and ease of installation makes PVC the preferred choice in distribution systems requiring adaptability.