Which of the following is NOT typically included in a medical air system?

In a medical air system, the primary components are designed to generate, store, and distribute medical air for use in healthcare facilities. A compressor is essential as it pressurizes ambient air to create the medical air supply. Pressure relief valves are crucial for ensuring safety by preventing over-pressurization, while automatic drains are necessary to remove moisture and contaminants from the air system, maintaining its integrity and functionality.

A vacuum pump, however, is not a component of a medical air system. Instead, it is part of a vacuum system, which serves a separate purpose, such as helping with suction for medical procedures or waste removal. In contrast, the medical air system focuses on providing clean, filtered air for patient care, breathing apparatus, and other applications. Therefore, the vacuum pump does not belong in a typical medical air system, making it the correct answer.