A sprinkler system with no water in the piping before activation and all sprinklers open is called which type?

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Multiple Choice

A sprinkler system with no water in the piping before activation and all sprinklers open is called which type?

This item tests how sprinkler piping is charged before activation and whether heads are open. A deluge system is designed so that all sprinkler heads are open and the piping remains empty of water until activation. When the system is activated, water is released to every open head, providing immediate, full-area coverage. This contrasts with wet-pipe systems, where the pipes are already filled with water; dry-pipe systems, which hold air in the pipes with water behind a valve that must be released; and preaction systems, which require a detection step before water enters the piping. Therefore, no water in the piping before activation and all heads open fits a deluge system.

This item tests how sprinkler piping is charged before activation and whether heads are open. A deluge system is designed so that all sprinkler heads are open and the piping remains empty of water until activation. When the system is activated, water is released to every open head, providing immediate, full-area coverage. This contrasts with wet-pipe systems, where the pipes are already filled with water; dry-pipe systems, which hold air in the pipes with water behind a valve that must be released; and preaction systems, which require a detection step before water enters the piping. Therefore, no water in the piping before activation and all heads open fits a deluge system.

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