Certified Professional Food Safety (CP-FS) Practice Exam

Backflow and back-siphonage prevention devices are required for which of the following?

1. Only at hand wash sinks

2. Only at three-compartment sinks

3. In any area of a food establishment to protect the water supply system

4. Only at drinking water faucets

The correct answer is: In any area of a food establishment to protect the water supply system

The correct choice highlights the necessity for backflow and back-siphonage prevention devices to be employed in any area of a food establishment to protect the water supply system. This is crucial for safeguarding public health and ensuring the safety of the food supply. Backflow can occur when there is a sudden change in pressure that allows contaminants from non-potable sources to enter the potable water supply. An effective backflow prevention device acts as a barrier, preventing any potential contaminants in the food establishment—from sinks, dishwashers, or other plumbing fixtures—from flowing back into the main water supply. In the context of food safety, this applies broadly throughout the establishment rather than being limited to specific types of fixtures such as hand wash sinks, three-compartment sinks, or drinking water faucets, which would each represent only a fraction of the potential backflow risks present. Therefore, the requirement for backflow prevention devices to be installed in various areas of a food establishment is justified as a critical measure for overall safety and compliance with health regulations.