What is the correct order for tightening SCBA face piece straps?

The correct order for tightening SCBA face piece straps is to start with the lower straps, followed by the upper straps. This method ensures a proper seal around the face piece, which is crucial for the effectiveness of the SCBA (Self-Contained Breathing Apparatus). By tightening the lower straps first, the face piece is better positioned against the wearer's face and can create a better seal before the upper straps are adjusted. This sequential tightening helps to evenly distribute pressure across the facial area and enhances comfort while ensuring maximum protection from contaminants.

Each adjustment plays a role in how well the SCBA functions. If the upper straps are tightened first, the face piece may pull away from the lower part of the face, creating gaps that could compromise safety. Therefore, the order of tightening is vital for both functionality and safety during firefighting operations.