What does color-coding on hydrants indicate?

What does color-coding on hydrants indicate?

• A. Water pressure
• B. Hydrant height
• C. Available flow
• D. Pipe material

Answer: (C)

Color-coding on hydrants shows the available flow—the amount of water the hydrant can deliver at a given time. This helps firefighters quickly judge whether a hydrant can supply enough water to support the firefighting operation, especially when using multiple hoses or large streams. It’s not about pressure, hydrant height, or pipe material. The colors map to flow ranges (the exact thresholds vary by location), for example indicating low, moderate, or high available flow. In practice, crews use the color cue to select hydrants that can meet the water demand without compromising supply to other operations.