Which type of pipe is most commonly used in water distribution systems due to its durability?

Ductile iron pipe is most commonly used in water distribution systems due to its exceptional durability and strength. This type of pipe is designed to withstand high pressures, making it suitable for various applications, including those in harsh environments. The material's resistance to corrosion, along with its ability to handle temperature variations and external loads, provides a long service life, making it a reliable choice for municipalities and water utilities.

Moreover, ductile iron pipe has excellent jointing methods, such as push-on or mechanical joints, which facilitate easier and more secure installations. This characteristic is crucial in water distribution, where tight seals help prevent leaks and maintain water quality.

While other pipe materials, like PVC, galvanized steel, and concrete, do have their own advantages and specific uses, none match the comprehensive durability and versatility of ductile iron for various installation configurations and environmental conditions typically encountered in water distribution systems.