What is the recommended average flow rate for an attack line?

The recommended average flow rate for an attack line is between 100 to 150 gallons per minute. This flow rate provides an effective balance between adequate water delivery to suppress fires while maintaining manageable pressures for firefighters in the field. Flows within this range are considered optimal for extinguishing various types of structural fires, effectively cooling the environment, and controlling potential flare-ups.

This specific flow rate ensures that the water can penetrate the fire's heat and reach the fuels, aiding in efficient fire knockdown. Additionally, maintaining this rate helps to create a protective barrier for firefighters by forming steam, thereby enhancing safety during firefighting operations.

In contrast, lower flow rates may not deliver sufficient water to combat larger or more intense fires, while excessively high flow rates could lead to operational difficulties, wastage of water, and added strain on equipment. Thus, understanding and adhering to the recommended flow rate is essential for effective firefighting strategies.