What should a user do if their SCBA mask is not fitting properly?

The proper action to take if the SCBA mask is not fitting correctly is to adjust the mask before use. A well-fitted mask is crucial for ensuring that the wearer has an adequate seal, which prevents contaminated air from entering the breathing apparatus. Adjustments can include re-positioning the straps, checking the size, or ensuring that any facial hair or protective gear does not interfere with the mask's seal.

Continuing to use the SCBA with a poorly fitted mask can result in inhaling harmful contaminants, leading to serious health risks. Using tape to secure the mask is not a reliable or safe solution, as it can damage the mask or still fail to achieve a proper seal. Seeking assistance from a colleague can be helpful, but the immediate responsibility lies with the user to ensure the equipment is functioning correctly before use. Thus, adjusting the mask is the most direct and effective way to ensure safety while operating the SCBA.