Which connection sizes does a Class III Standpipe Outlet feature?

A Class III Standpipe Outlet is specifically designed to accommodate both fire department use and internal building needs. The standard sizes for these outlets are typically 2½ inches and 1½ inches. The 2½-inch outlet is primarily intended for use by fire hoses and is compatible with the larger, more robust fire department connections, allowing for a significant water flow necessary during fire suppression operations. Conversely, the 1½-inch outlet is suitable for smaller hoses or for use by occupants of the building, facilitating easier access to water for firefighting by trained personnel within the structure. This combination ensures both versatility and effectiveness in firefighting efforts.

The other connection size options do not align with the specifications for a Class III Standpipe Outlet, which is designed primarily for fire safety and emergency response.