Cross Connection Practice Exam

Where is it not permissible to install an Air Gap?

1. On residential properties

2. Where the atmosphere may be contaminated

3. At the water treatment facility

4. In irrigation systems

The correct answer is: Where the atmosphere may be contaminated

An air gap is a critical method used to prevent backflow and contamination of potable water. It is defined as a physical separation between the water supply and the potentially contaminated source. Understanding where air gaps should not be installed is essential for maintaining water safety and quality. In scenarios where the atmosphere may be contaminated, the presence of an air gap can potentially allow contaminants from the surrounding atmosphere to enter the water system. This poses a risk because contaminated atmospheric conditions can lead directly to compromised water quality. Therefore, it is crucial to install air gaps in locations with controlled environments, ensuring that the water supply remains safe from external contamination sources. On the other hand, installing an air gap at residential properties, at water treatment facilities, or in irrigation systems can be acceptable because these environments can often be designed and managed to ensure that the integrity of the water supply is maintained. Each of these locations typically has protocols in place to protect against potential contamination when air gaps are used correctly.