Which of the following sets includes three common pipe materials used in potable water distribution that a C-34 contractor would install?

• A. Copper, bronze, and brass.
• B. Ductile iron, PVC, and HDPE.
• C. Steel, concrete, and clay pipe.
• D. Fiberglass, glass, and ceramic.

Answer: (B)

The question tests knowledge of the three pipe materials commonly used in modern potable water distribution by a C-34 contractor. Ductile iron, PVC, and HDPE are the standard choices because they balance strength, durability, and water quality compatibility.

Ductile iron provides high strength to handle significant pressure in large-diameter mains and is routinely coated and lined to resist internal corrosion, making it a reliable traditional option for potable water. PVC offers excellent corrosion resistance, is lightweight, easy to install with solvent-weld joints, and is cost-effective for many distribution applications. HDPE is exceptionally resistant to corrosion, highly flexible, and can be fusion-welded to create long, seamless runs, which is especially advantageous for trenchless installations.

Other materials listed are either not as widely used across typical distribution networks for drinking water or are specialized for different applications (such as older steel, concrete, or clay pipe; or non-metal/glass/ceramic options). Thus, ductile iron, PVC, and HDPE form the most common trio for potable water distribution work.