Which component is used to indicate the valve position remotely in a sprinkler system?

• A. Flow switch
• B. Fire pump
• C. Post-indicator valve
• D. Pressure relief valve

Answer: (C)

The post-indicator valve is designed to show the valve’s status from a distance. It includes a visible indicator post that moves with the valve stem, so you can tell at a glance whether the main valve is open or closed without having to reach the valve itself. This remote indication is crucial for confirming system readiness and for responders during an alarm or maintenance.

Flow switches monitor water movement in the line, not the valve position; a fire pump is a separate device for boosting pressure, and a pressure relief valve vents excess pressure. So the post-indicator valve is the component that provides remote valve-position indication.