In a Grid-Loop System, which statement accurately describes its capabilities?

• A. It cannot be expanded.
• B. It allows future expansion and isolating contaminants by section.
• C. It is rarely used for new construction.
• D. It relies on a single main from the source.

Answer: (B)

Flexibility and scalability are the defining features of a grid-loop system. Its looped layout with multiple pathways and valve control lets you add new sections as demand grows, without overhauling the entire network. At the same time, you can isolate a problem area by closing valves around a contaminated segment, keeping the rest of the system in service. That combination—easy expansion and sectional containment—is what makes this description the best fit. The idea that it cannot be expanded ignores the very looped design; claiming it’s rarely used for new construction overlooks its popularity for building in redundancy and future growth; and saying it relies on a single main from the source contradicts the multiple-branch, looped feed paths that allow isolation and resilience.