Which of the following materials is commonly used for a water service pipe?

Copper is commonly used for water service pipes due to its exceptional durability, resistance to corrosion, and ability to withstand high pressures. It has a long lifespan, often exceeding 50 years, and remains reliable under a variety of environmental conditions. Additionally, copper has antimicrobial properties, which help maintain water quality by inhibiting the growth of bacteria.

While PVC, cast iron, and polyethylene are used in various plumbing applications, they have limitations that make them less favorable for water service pipes. For instance, PVC can be affected by temperature changes leading to brittleness, while cast iron is heavy and subject to corrosion over time. Polyethylene is often used in specific applications but may not provide the same structural integrity or longevity as copper in a water service line. Thus, copper stands out as the preferred material for reliable and safe water service connections.