Which of the following is a typical cause of a line not delivering water?

• A. Kinks, leaks, trapped air, or a closed valve.
• B. Loose screws on the nozzle.
• C. Color of the hose.
• D. Ambient temperature.

Answer: (A)

When a hose line isn’t delivering water, the most common issues are restrictions or blocks and air in the line, or the supply being shut off. A kink or sharp bend can squeeze the hose and stop water flow; even a small bend can drastically limit or halt flow. Leaks along the hose or at fittings drain pressure before the water reaches the nozzle, so you don’t get a solid stream. Trapped air in the line acts like a cork, preventing water from moving all the way through until you purge the air. A closed valve—whether at the hydrant or on the pump/discharge line—cuts off the entire flow.

Items like loose screws on the nozzle can cause spray irregularities or leaks, but they don’t typically stop water from reaching the nozzle itself. The color of the hose and ambient temperature don’t determine whether water can flow in normal firefighting conditions.

In practice, check for kinks, inspect for leaks, purge any trapped air by opening the nozzle and flushing the line, and verify all valves between the water source and the nozzle are fully open.