What is the use of isolation valve in fire fighting system?

An isolation valve in a fire fighting system is used to control the flow of water or other extinguishing agents within the system. It allows firefighters to isolate specific sections of the system for maintenance, repair, or when certain areas are not in use, ensuring that the rest of the system remains operational. This enhances safety by preventing unintended discharges and maintaining system pressure where needed. Additionally, isolation valves can help in managing water supply during a fire incident, focusing resources where they are most needed.