What is the principal pipe, often installed underground, in a water distribution system?

• A. Water Main
• B. Primary Feeder
• C. Secondary Feeder
• D. Grid or Gridiron Pipe

Answer: (A)

Understanding the principal conduit in a water distribution system: the main pipe buried underground serves as the backbone of the network, carrying treated water from the treatment plant into the distribution system under pressure. It is large in diameter and set underground in streets, from which smaller mains and feeders branch off to serve neighborhoods and properties. This main line is the central trunk; feeders are downstream branches that extend distribution, and a gridiron term isn’t a standard description for the main line in municipal systems.