What is the primary use of spanner wrenches in firefighting?

Spanner wrenches are primarily used to tighten couplings, which are critical fittings that connect hoses and pipes in firefighting operations. When firefighters deploy hoses to deliver water, it is essential to ensure that the couplings are securely fastened to prevent leaks and maintain water pressure. The design of spanner wrenches allows firefighters to grip the nuts and fittings of couplings effectively, providing the necessary torque to tighten them appropriately.

Using a spanner wrench helps ensure the reliability of the hose connections during an emergency. A loose coupling can lead to dangerous situations where water flow may be compromised, jeopardizing firefighting efforts. Therefore, the primary function of spanner wrenches in the firefighting context is to guarantee secure connections between hoses and fittings, facilitating efficient and safe operation during firefighting responses.