What is the diameter of the tip on the smooth bore nozzle used on the CFEMS high-rise pack?

The diameter of the tip on the smooth bore nozzle used on the CFEMS high-rise pack is indeed 7/8 inch. Smooth bore nozzles create a streamlined flow of water, which is essential for effective firefighting, especially in high-rise situations where reach and penetration of the water stream are critical.

The 7/8 inch tip is specifically designed to provide a balance between sufficient flow and pressure, allowing for an effective firefighting strategy that can deliver water effectively at high elevations. The flow characteristics of this tip size make it suitable for achieving the necessary distance and impact to combat fires in high-rise structures.

Other options like 1 inch, 3/4 inch, and 1.5 inches would not be ideal for this application. A 1 inch tip might provide a higher flow but could lead to difficulties with maneuverability and control, while a 3/4 inch tip would reduce the flow rate and may not deliver the necessary pressure to be effective in a high-rise environment. A 1.5 inch tip would substantially increase the volume of water flowing, which may not be optimal for the specific firefighting tactics used in high-rise scenarios. Thus, 7/8 inch is the best choice for this specific application.