Large water mains that surround and contribute water supply within a grid from several different directions would be an?

• A. Arterial loop system
• B. Ring distribution network
• C. Grid main system
• D. Central feeder network

Answer: (A)

The main idea here is redundancy and multiple flow paths in the distribution network. An arterial loop system uses large-diameter mains laid out in loops that surround and run through the service area, allowing water to be delivered from several directions. This looped configuration provides multiple supply paths, so if one segment is shut down for maintenance or suffers a failure, water can still reach all areas via the other leg of the loop, maintaining pressure and fire-flow capability. While ring or neighborhood loops exist, they typically describe smaller-scale loops and do not capture the function of major trunk mains forming an expansive grid feeding water from multiple directions.