Which automatic sprinkler system normally has open sprinkler heads?

Which automatic sprinkler system normally has open sprinkler heads?

• A. Dry pipe
• B. Pre-action
• C. Deluge
• D. Wet

Answer: (C)

Deluge systems have sprinkler heads that are all open. When the system activates, water is released through every head at once, providing immediate, wide-area coverage. This contrasts with wet, dry, and pre-action systems, where heads are normally closed and water only reaches specific heads or requires a two-step release. The open-head design is why deluge systems are used in areas needing rapid, expansive sprinkler coverage.

Deluge systems have sprinkler heads that are all open. When the system activates, water is released through every head at once, providing immediate, wide-area coverage. This contrasts with wet, dry, and pre-action systems, where heads are normally closed and water only reaches specific heads or requires a two-step release. The open-head design is why deluge systems are used in areas needing rapid, expansive sprinkler coverage.