Which type of standpipe system is specifically designed for use by fire department personnel only?

The Class 1 Standpipe system is specifically designed for use by fire department personnel. This type of standpipe is typically equipped with 2 ½-inch hose connections and is intended to provide a means for firefighters to quickly access water in order to combat fires effectively in commercial and industrial buildings. The design focuses on enabling professional firefighters to connect their hoses directly to the standpipe system without reliance on building occupants.

In contrast, Class 2 Standpipes are designed for use by trained personnel within the building, providing 1 ½-inch hose connections primarily for use by the occupants or designated staff. Class 3 Standpipes serve a dual purpose, offering both the larger connections for the fire department and smaller connections for occupant use. An occupant standpipe is specifically intended for use by building tenants, featuring a lightweight hose that is easier for non-professionals to handle.

Thus, the defining feature of a Class 1 Standpipe is its exclusive design for firefighter use, enhancing their operational efficiency and safety during fire suppression activities.