What are the two main types of standpipe systems?

The two main types of standpipe systems are classified as wet and dry. Wet standpipe systems are always filled with water and are connected to a water supply, allowing for immediate availability during a fire emergency. This type of system is most effective in buildings that are continuously occupied, as there is a constant presence of water available for firefighting.

On the other hand, dry standpipe systems are not filled with water and are primarily used in locations where freezing can occur. In these systems, when a fire emergency occurs, firefighters must connect a hose to the system and supply water manually, typically using fire engines. This can be useful in areas that are not heated or in climates where temperatures drop significantly.

The choice regarding manual and automatic systems refers to operation modes rather than standpipe types, while active and passive encompasses broader categories that include various fire protection measures, not specifically standpipes. Understanding the distinction between wet and dry systems is essential for their appropriate application and for ensuring effective firefighting strategies in different building scenarios.