Real-World Scenarios
Case studies from the field. Read the situation, decide what you would do, then reveal each step to compare your plan against a guided answer.
Site
Cold-storage distribution center, wet-pipe system on Riser 2 with a vane-type waterflow switch and a 60-second retard. The fire department responded to a waterflow alarm at 05:40 and found no fire.
FACP · Panel display
ALARM: WATERFLOW
RISER 2 · ZONE 5 · WEST WAREHOUSE · 05:40
What you find on arrival
You arrive at 07:30. The panel shows WATERFLOW ALARM Zone 5 (Riser 2), still latched. The FD found no smoke, no fire, and no visible water, and released the building. The manager says the alarm bell outside 'kept ringing' for 20 minutes.
What do you do?
Waterflow is an alarm signal — a sprinkler may have opened, or the system is tripping falsely. How do you sort it out?