Which type of piping is most commonly used in water distribution systems?

Ductile iron pipe is the most commonly used type of piping in water distribution systems due to its excellent strength, durability, and resistance to corrosion when properly coated. It can handle high pressure and is capable of withstanding the stresses that come from the water flow and environmental conditions. This type of pipe is designed for longevity, often lasting several decades, which contributes to its popularity in municipal water applications.

The inherent properties of ductile iron also make it suitable for a variety of installation conditions, including those where soil conditions may be less than ideal. Its ability to be produced in a range of sizes and wall thicknesses further enhances its adaptability for different project needs. Additionally, diligent manufacturers have improved the reliability of ductile iron pipes through technological advancements, making them a trusted choice for water distribution systems around the world.

While other materials such as PVC, steel, and copper are also used, each has limitations in terms of strength, joint integrity, and susceptibility to environmental factors compared to ductile iron. Hence, ductile iron stands out as the preferred option for many water utility managers and engineers.