What safety precaution is essential when servicing low-pressure systems?

When servicing low-pressure systems, one essential safety precaution is to avoid siphoning refrigerant by mouth. This practice is critical because refrigerants can be harmful if ingested, inhaled, or come into contact with skin. Refrigerants have various health risks, including being toxic or irritating to respiratory systems, and can lead to asphyxiation in severe cases. Additionally, ingesting or inhaling refrigerants can cause severe long-term health complications.

Using proper methods for handling refrigerants, such as utilizing appropriate recovery equipment and tools designed for refrigerant transfer, helps ensure safety and compliance with regulations. This practice reflects a commitment to safety and protects both the technician and the environment.

The other options suggest unsafe practices, such as releasing refrigerants into the atmosphere, which is prohibited under EPA regulations, and using personal protective gear to ensure safety is paramount in any servicing operation.