Which maintenance task is essential for SCBA facepieces?

The essential maintenance task for SCBA facepieces involves replacing filters and lenses as needed. This is crucial because filters are designed to remove contaminants and ensure that the air supply remains free of harmful particles. Over time, filters can become saturated or clogged, which diminishes their effectiveness. Regular inspection and replacement of filters ensure that the SCBA continues to provide clean air, which is vital for the safety of the user in hazardous environments.

Additionally, the lenses on the facepiece must be clear and free from damage or scratches, as they are necessary for visibility. If a lens is compromised, it can obstruct the user’s vision in critical situations. Thus, maintaining the integrity of the filters and lenses directly impacts the operational reliability and safety of the SCBA.