What is the function of the low pressure line in an SCBA system?

The function of the low pressure line in an SCBA (Self-Contained Breathing Apparatus) system is to be connected to the regulator. This connection is crucial because the regulator is responsible for reducing the high-pressure air from the tank to a breathable pressure. Once the air is regulated, it flows into the mask for the user to inhale. The low pressure line ensures that the air delivered to the user is at a safe and controllable pressure, allowing for effective and safe breathing while in hazardous environments.

Other connections, such as to the pressure gauge assembly, air tank, or safety harness, serve different functions within the SCBA system. The pressure gauge assembly provides monitoring of the air pressure within the tank, the air tank is the storage for pressurized air, and the safety harness is for securing the SCBA system to the user's body. However, the key role of the low pressure line is its connection to the regulator, which directly affects the usability and safety of the breathing apparatus.