Master streams are defined to flow a minimum of _____.

Master streams are defined to flow a minimum of 350 gallons per minute (GPM). This specification is rooted in the need for a significant amount of water to effectively combat large-scale fires, especially in commercial structures or during wildland fire operations. The 350 GPM flow rate ensures that the water delivered is sufficient to create a strong enough stream to penetrate and reach the source of the fire, while also helping to control heat and reduce the possibility of re-ignition in the surrounding areas. This standard is crucial for effective firefighting strategies, as lower flow rates might not provide enough suppression capabilities in high-intensity fire environments. Understanding this flow rate helps firefighters properly select the appropriate equipment and tactics needed for various emergency situations.