The most commonly used attack lines are what diameter hose?

The most commonly used attack lines are typically 1 3/4 inch diameter hoses. This size strikes a balance between ease of handling and the ability to deliver an adequate volume of water to effectively combat fires. The 1 3/4 inch hose can deliver a sufficient flow rate, making it versatile for various fire scenarios, including residential and commercial structures.

Using a 1 3/4 inch line allows firefighters to manage the hose more easily while providing enough pressure and flow to tackle the majority of fire incidents. Fire departments favor this hose size for initial attack lines due to its performance characteristics and the efficiency it offers during operations. Hoses of smaller diameters, like 1 inch, may not provide sufficient water flow, while larger hoses, such as 2 inch, can be more cumbersome, particularly for quick maneuvers in tight spaces.