On a 5-inch hose, what does the marking at 50 feet look like?

• A. Double line
• B. Single line at 50'
• C. No line at 50'
• D. Triple line

Answer: (A)

On large-diameter hose, markings along the hose are used so firefighters can quickly gauge how much hose has been laid out. For a 5-inch hose, the 50-foot point is shown with two parallel lines—the double line. This two-line symbol stands out clearly and is tied to the 50-foot increment, helping you recognize the distance at a glance even in low visibility. A single line, no line, or a different pattern would indicate other distances or no marking at that spot, so the double-line mark is the best cue for 50 feet.