What is considered a master stream for firefighting purposes?

A master stream in firefighting is defined as a large volume water delivery system that can effectively control and extinguish significant fire loads. Typically, a master stream is considered to have a flow rate of more than 350 gallons per minute (gpm).

This high flow capacity is essential in large-scale firefighting scenarios, such as high-rise buildings, commercial structures, or extensive outdoor fires, where traditional handlines may not suffice. The ability to deliver such substantial volumes of water helps achieve better penetration of the fire and provides a wider reach to combat flames from a safe distance.

Fire departments utilize master streams through various apparatus such as aerial devices, deck guns, or portable monitors, all designed to handle the increased stresses and flow capacities associated with high-volume firefighting efforts. This capability is crucial in maximizing the effectiveness of firefighting operations and minimizing property damage.