What color disc signifies that a system is partially out of service?

In the context of sprinkler systems, a blue disc is used to indicate that a system is partially out of service. This color coding helps firefighters and other emergency responders quickly assess the operational status of a fire suppression system during an emergency situation.

The blue color specifically communicates that while some parts of the system may still be functional, there are limitations or areas that cannot operate effectively. This ensures that personnel are aware of the potential hazards and can plan their strategy accordingly, especially in environments where time and reliability are crucial during an emergency response. Understanding these color codes plays a vital role in ensuring safety and effective firefighting operations.

Moreover, the other colors, such as green, yellow, and red, typically have specific meanings related to the system's operational status but do not signify partial service as effectively as blue does. This clear distinction helps maintain focus on the critical aspects of fire safety and management systems.