When refilling an SCBA cylinder, what is the essential action to take?

Inspecting the cylinder before filling it is crucial for ensuring safety and maintaining equipment integrity. This action helps to identify any potential issues, such as damage or defects, that could lead to leaks or malfunctions during use. Proper inspection includes checking for dents, corrosion, and ensuring that the cylinder's pressure gauge is functioning correctly.

By prioritizing the inspection process, personnel can prevent accidents and ensure that the SCBA (Self-Contained Breathing Apparatus) cylinder is safe for operation. This step is a vital part of the overall safety protocols when dealing with high-pressure equipment. Neglecting this step could result in filling a compromised cylinder, putting the user at risk during firefighting operations.