What action should be taken before using an SCBA?

Before using a Self-Contained Breathing Apparatus (SCBA), it is crucial to check the air supply pressure. This action ensures that the SCBA has a sufficient amount of breathable air to sustain the user for the duration of the operation. Proper air pressure verification allows the user to assess whether the SCBA is ready for use and capable of providing adequate oxygen to ensure safety in a hazardous environment.

Ensuring the air supply pressure is within safe limits and operational readiness is fundamental to avoid potential risks during use. A pressure check helps prevent situations where the SCBA might run out of air unexpectedly, which can be life-threatening. This proactive measure is a standard safety protocol in the use of SCBAs, emphasizing the importance of equipment readiness over other considerations like planning or attire.