![]() Many firefighters will say that two 2½-inch hoselines equal one 5-inch hoseline, but this is not the case. ![]() Both 2½- and 3-inch hoselines are considered medium-diameter, while the 5-inch hoseline is considered large-diameter. The three most common supply hoseline setups are two 2½-inch, two 3-inch and a single 5-inch supply hoseline. For hydrant operations, firefighters must understand the capabilities and limitations of the supply hoselines as well as the water main system that is supplying the hydrants, not to mention the hydrants themselves. While some operations will be performed through drafting, water shuttles or relay pumping, the most common and basic water supply operation is through a fire hydrant. Effective supply hoseline operations are essential to engine company operations.
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