What typically differentiates a preaction system from a deluge system?

The distinguishing feature of a preaction system compared to a deluge system lies in the use of automatic sprinklers and the maintenance of pressure in the piping. In a preaction system, the piping is pressurized, and it typically requires a two-step activation process: an alarm or detection system must first trigger to release water into the piping before it can activate the sprinklers. This setup allows for increased control since water isn't immediately released, providing a safeguard against accidental activation.

In contrast, a deluge system operates differently; it has open sprinkler heads and releases a large volume of water in response to manual activation or detection of fire. Deluge systems are often employed in areas where a rapid response to a fire is crucial, such as in high-hazard environments.

Understanding this key difference helps in distinguishing the appropriate applications for each system. The focus on automatic sprinklers with maintained pressure in a preaction system contributes to its unique functionality within fire protection strategies.