In which type of automatic sprinkler system does water flow from all the sprinkler heads when the system is activated?

In which type of automatic sprinkler system does water flow from all the sprinkler heads when the system is activated?

• A. Wet-pipe
• B. Delayed-pipe
• C. Dry-pipe
• D. Deluge

Answer: (D)

In a deluge sprinkler system, all sprinkler heads are open and connected to the same water supply, so when the system is activated, water flows from every head simultaneously. This provides immediate, wide coverage for high-hazard areas. In contrast, wet-pipe systems have water-filled pipes where only the heat-activated head releases water, dry-pipe systems hold air in the piping and water fills the lines after activation (not all heads discharge at once), and delayed-pipe systems introduce a delay before water reaches the heads.

In a deluge sprinkler system, all sprinkler heads are open and connected to the same water supply, so when the system is activated, water flows from every head simultaneously. This provides immediate, wide coverage for high-hazard areas. In contrast, wet-pipe systems have water-filled pipes where only the heat-activated head releases water, dry-pipe systems hold air in the piping and water fills the lines after activation (not all heads discharge at once), and delayed-pipe systems introduce a delay before water reaches the heads.