What tool is specifically used to open or close a hydrant?

The hydrant wrench is specifically designed for operating fire hydrants. Its unique shape allows firefighters to easily grip and turn the valve nut on a hydrant to either open or close it effectively. This tool often features a large handle and a specially fitted head that accommodates the various sizes of hydrant nuts, making it efficient for quick operations under emergency conditions.

Other tools listed may have various applications in fire service tasks, such as tightening or loosening hardware or gripping items, but they lack the specific design features and utility required for manipulating hydrant valves safely and efficiently. This focused purpose of the hydrant wrench makes it an essential tool for firefighting operations involving water supply.