Which sprinkler system has all sprinkler heads open and water is released through all heads?

Which sprinkler system has all sprinkler heads open and water is released through all heads?

• A. Wet Pipe
• B. Dry Pipe
• C. Deluge
• D. Preaction

Answer: (C)

Deluge systems flood the entire sprinkler network. All heads are open, so when the system is activated water is released through every head at once, delivering rapid, widespread suppression across the protected area. This is different from other types where water only flows from the head that triggers or where water release requires a detector or a delay. Wet pipe systems have water-filled pipes with heads normally closed by heat-sensitive devices, so only the activated head pours water. Dry-pipe systems hold air in the pipes and release water into the network after a trigger, but not necessarily through all heads simultaneously. Preaction requires a two-step process (detection triggering water release into the pipes before heads release water). Deluge is the one where every head delivers water immediately on activation.

Deluge systems flood the entire sprinkler network. All heads are open, so when the system is activated water is released through every head at once, delivering rapid, widespread suppression across the protected area. This is different from other types where water only flows from the head that triggers or where water release requires a detector or a delay. Wet pipe systems have water-filled pipes with heads normally closed by heat-sensitive devices, so only the activated head pours water. Dry-pipe systems hold air in the pipes and release water into the network after a trigger, but not necessarily through all heads simultaneously. Preaction requires a two-step process (detection triggering water release into the pipes before heads release water). Deluge is the one where every head delivers water immediately on activation.