What term describes an arrangement of water mains that delivers water to hydrants from multiple directions simultaneously?

The correct term used to describe an arrangement of water mains that delivers water to hydrants from multiple directions simultaneously is a grid. A grid system ensures redundancy and reliability in the water supply, allowing multiple paths for water to reach hydrants. This design enhances flow rate and pressure at the hydrants, providing firefighters with immediate access to water from various locations, which is crucial during firefighting operations.

While matrix, nexus, and web might suggest interconnectedness, they do not convey the structured and specifically designed nature of a water distribution grid. The grid layout maintains efficiency and reliability, especially in urban areas where fire hydrants are densely located, emphasizing the importance of this design in fire protection infrastructure.