What is the role of a pre-action sprinkler system?

The role of a pre-action sprinkler system is best captured by its ability to combine the principles of wet and dry pipe systems. In a pre-action system, the piping is filled with air, similar to a dry pipe system, which prevents water from flowing until the system is activated. However, it also has a pre-action valve that requires a fire detection component to activate, allowing water to fill the pipes before the actual sprinklers discharge. This design minimizes the risk of accidental water discharge, making it ideal for environments sensitive to water damage, such as museums or data centers.

The combination of wet and dry pipe principles is what gives pre-action systems their unique functionality, providing flexibility for various applications while ensuring that water is not released unless there is a confirmed presence of fire.