What direction do you turn the red bypass knob to check the bypass?

The red bypass knob on the MSA G1 Self-Contained Breathing Apparatus (SCBA) is designed for operational checks, particularly to allow air to flow bypassing the regulator. To check the bypass, turning the knob counter-clockwise is the correct action. This motion opens the bypass valve, enabling the user to ensure that the air supply is functioning properly and that the bypass system is operational. The counter-clockwise direction is standard for valves that are intended to open, which further assures that the bypass mechanism can effectively provide air if needed during operation.

Understanding the function and correct operation of the bypass knob is important for personnel trained in using SCBA. It ensures that in an emergency or low-pressure situation, the user can still receive breathable air. This operational knowledge is crucial for maintaining safety while using the apparatus in hazardous environments.