Which size fire stream flows 40-350 gallons per minute (gpm) (160-1,400 liters per minute [L/min])?

• A. Master stream
• B. Hand line stream
• C. Low-volume stream
• D. High-volume stream

Answer: (B)

Flow rate is the key way fire streams are categorized. Handline streams are the standard portable hoses firefighters use for interior suppression, and they are designed for maneuverability and controlled application of water. The 40–350 gpm range fits the typical output of a handline, providing enough flow to attack the fire while still allowing the nozzle operator to maintain control and reach. Smaller flows (under 40 gpm) are considered low-volume streams and are used for light tasks or protective actions with less cooling power. Larger flows (above 350 gpm) come from master streams or high-volume setups, produced by deck guns, monitors, or large-diameter hose, and are used for rapid knockdown of big fires or defensive operations. So the range given specifically matches what a handline stream delivers.