JIBC Exterior Practice Exam 2026 – Complete Test Prep

Flow through a handline is largely about hose size and nozzle pressure. A 65-mm hose (about 2.5 inches) is designed to move a substantial volume of water when operated with a typical firefighting nozzle, so its standard or commonly expected discharge sits around 250 gallons per minute. That’s about 946 liters per minute (250 × 3.785 L per gallon). So the typical delivery for this hose size is roughly 950 L/min.

In practice, the exact flow can vary with the specific nozzle type and the supply pressure, but 946 L/min (250 gpm) is the standard reference for a 65-mm handline. The other values would imply nozzle settings or conditions outside the usual range for this hose size.