Which option correctly represents the 38-mm attack hose typical flow in liters per minute?

Which option correctly represents the 38-mm attack hose typical flow in liters per minute?

• A. 473-757 L/min (125-200 gpm)
• B. 189-473 L/min (50-125 gpm)
• C. 757-946 L/min (200-250 gpm)
• D. Over 946 L/min (250 gpm)

Answer: (B)

Flow through a 38-mm attack hose is limited by its small diameter and typical nozzle pressures, so the practical discharge is on the lower end of handline flows. In common firefighting practice this size delivers roughly 50 to 125 gallons per minute, which converts to about 190 to 470 liters per minute. Among the given options, the range that best matches this typical operating band is about 190 to 473 L/min. That reflects the usual capability of a 38-mm handline under standard nozzle settings. Higher ranges would require a larger hose or multiple lines, and lower ranges aren’t typical for an actively used handline.

Flow through a 38-mm attack hose is limited by its small diameter and typical nozzle pressures, so the practical discharge is on the lower end of handline flows. In common firefighting practice this size delivers roughly 50 to 125 gallons per minute, which converts to about 190 to 470 liters per minute. Among the given options, the range that best matches this typical operating band is about 190 to 473 L/min. That reflects the usual capability of a 38-mm handline under standard nozzle settings. Higher ranges would require a larger hose or multiple lines, and lower ranges aren’t typical for an actively used handline.