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

The correct term for an arrangement of water mains that delivers water to hydrants from multiple directions is "Loop." A looped water main system involves the configuration of pipes in such a way that there are multiple pathways for water to travel, creating redundancy and ensuring that if one section of the main is out of service or if there is a blockage, water can still be supplied to the hydrants from alternative routes.

This design enhances the reliability and efficiency of the water distribution system, allowing for improved water pressure and flow during emergencies, such as fire situations. Loop systems minimize the risk of complete loss of supply to any hydrant within the network, which is crucial for firefighting efforts.

In contrast, a grid system generally refers to a network of interconnected pipes and mains but does not specifically imply that the water can flow towards hydrants from multiple angles in the same effective manner as a loop does. Branch systems refer to a configuration where pipes extend outwards from a central point, potentially leading to isolated sections that might not have multiple supply routes. The term "network" could be considered in a broader context but does not specifically denote the multiple directional supply characteristic that "Loop" encompasses.