TRAINING Firefighter Topics Nozzle Applications Operating Hose Lines Master Stream

An article about the master stream definition and types of master stream operations. A master stream is used when flows surpass 350 GPM becoming to difficult to be delivered from a handline operation due to nozzle reaction. The stream that a master stream operation produces is high in flow and usually in the form of a straight stream using a smooth bore tip or some type of combination nozzle.

An article about the firefighting in a high-rise buildings with the use of master stream devices. In today's high-rise office buildings possessing large, open floor areas (cubicles have mostly replaced walled offices) and a substantial petroleum- based fire load generating massive BTUs from the burning plastics and synthetics, a large-diameter handline is almost dictated as the only relatively safe, effective method of fire control. These fires are just too hot and intense for smaller lines to be effective.