What is a common use for shut-off valves in a water supply system?

Shut-off valves are primarily utilized to isolate sections of a water supply system for maintenance or repairs. This function is crucial because it allows firefighters and maintenance personnel to safely conduct work on specific sections of the plumbing without disrupting the entire system. When a section is isolated using a shut-off valve, the flow of water can be stopped in that area, preventing any potential flooding, ensuring safety during repairs, and maintaining operational integrity.

The ability to temporarily disconnect parts of the water supply system is particularly important in emergency scenarios where prompt and effective maintenance is necessary. By allowing work to be done safely and efficiently, shut-off valves facilitate quicker responses to situations that may arise in fire fighting or maintenance contexts.