What should firefighters avoid doing with hose couplings that continue to leak after being tightened?

Using excessive force to tighten hose couplings that continue to leak can lead to damage to the coupling or hose. When attempting to seal a leak, it's important to apply an appropriate amount of pressure rather than forcing the coupling tighter, which can strip threads or cause deformation of the components. This could create further issues down the line, including making the coupling completely unusable or leading to additional leaks.

Firefighters are trained to recognize that a persistent leak after tightening indicates a need for a more appropriate response, such as inspecting the gasket or O-ring for damage or ensuring that the coupling is properly aligned. Addressing the underlying cause of the leak is essential rather than resorting to brute force, which could exacerbate the problem. By understanding the proper methods to manage leaks, firefighters can ensure the reliability and safety of their equipment.