Which tool is specifically designed for tightening and loosening hose couplings?

The spanner wrench is specifically designed for tightening and loosening hose couplings, making it an essential tool for firefighters when connecting or disconnecting hoses in emergency situations. This tool features a unique design that allows it to grip various sizes of couplings securely, providing the necessary leverage to tighten or loosen them without damaging the coupling itself. This is particularly important in high-pressure situations where quick and efficient hose management is crucial.

The design of the spanner wrench typically includes a flat or hooked end that fits snugly over the coupling, enabling firefighters to apply force safely. Its versatility in managing different sizes of couplings adds to its practical value in firefighting operations, ensuring that connections are secure and reliable.

While other tools listed have important roles in firefighting operations—such as the rope hose tool for managing hoses on the ground, the hydrant wrench for opening hydrants, and the Siamese used for connecting multiple hoses—they do not specifically serve the purpose of tightening and loosening hose couplings like the spanner wrench does.