What type of water distribution system configuration generally has smaller mains and terminates as dead ends?

• A. Tree System
• B. Grid System
• C. Looped System
• D. Radial System

Answer: (A)

In a water distribution network, the layout describes how pipes branch out from the main supply to reach all customers. A tree system fans out from a central main into progressively smaller mains, similar to how a tree’s branches divide. Because it relies on branching without loops, each branch ends in its own terminus, creating dead ends. The outcome is a network where mains get smaller as you move away from the source and many endpoints are left as dead ends. This contrasts with grid or looped systems, which form interconnected loops for redundancy and multiple flow paths, and with radial systems that typically involve a more straightforward, single-path feed with laterals. The branching, diminishing-diameter pattern that ends in dead ends is the hallmark of a tree system.