State Food Safety Practice Exam

If an air gap cannot be used to prevent backflow, what should a manager install?

1. Automatic faucet

2. Backflow prevention device

3. Plumber for weekly checks

4. Employee training on monitoring water levels

The correct answer is: Backflow prevention device

In situations where an air gap cannot be employed to prevent backflow, the installation of a backflow prevention device is essential. Backflow occurs when water flows in the opposite direction, potentially contaminating the potable water supply with pollutants or hazardous substances. A backflow prevention device is specifically designed to stop this reverse flow, ensuring that water systems remain safe and drinkable. These devices function by creating a physical barrier or mechanism that only allows water to flow in one direction, thus preventing any contaminants from entering the clean water supply. This is particularly crucial in foodservice establishments where the risk of contamination can lead to health hazards for consumers. In contrast, while options like an automatic faucet, plumber checks, or employee training on monitoring water levels can contribute to overall water safety and operational efficiency, they do not directly address the issue of backflow prevention. Therefore, having a backflow prevention device installed is the most effective measure to ensure water safety when an air gap is not possible.