What diameter is the pre-connected attack line on the front bumper?

The pre-connected attack line on the front bumper is typically 1 ¾ inches in diameter. This size is standardized for many fire departments and is designed to strike a balance between maneuverability and the ability to deliver adequate water flow for initial attack operations.

The 1 ¾ inch line allows firefighters to easily handle and deploy the hose, especially in tight spaces or during fast-paced operations typical of initial fire attacks. It is also versatile enough to provide an effective water stream for a variety of fire situations, such as residential or small commercial fires.

Larger diameters, such as 2 ½ inches or more, are generally used for supply lines or for operations that require a higher volume of water flow, but these would be less practical for the quick deployment often needed in the initial firefighting response. The design choice for the front bumper pre-connected attack line reflects the need for ease of use while still ensuring that firefighters have the capability to effectively manage a fire situation quickly.