What is the average lifespan of a well-maintained water main?

The average lifespan of a well-maintained water main is typically 50 to 100 years. This longevity is influenced by several factors, including the materials used for construction (such as ductile iron, PVC, or cast iron), the environmental conditions where the water main is installed, and the quality of maintenance and repairs carried out over the years. Water mains are designed to withstand operational pressures and are subject to rigorous standards to ensure durability.

When properly maintained, including regular inspections and timely repairs, water mains can endure significant wear and tear, allowing them to remain functional for generations. In contrast, lower lifespans associated with other options reflect the realities of less effective maintenance, inferior materials, or extreme environmental conditions that would necessitate more frequent replacement and repair.