Certified Professional Food Safety (CP-FS) Practice Exam

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What is required for air gaps in a foodservice establishment's plumbing system?

Must be at least the same diameter as the water supply inlet
Can be smaller than the inlet
Do not need to be measured
Only need to exist if there are visible leaks

The correct answer is: Must be at least the same diameter as the water supply inlet

The requirement for air gaps in a foodservice establishment's plumbing system is that they must be at least the same diameter as the water supply inlet. This is crucial for preventing cross-contamination and ensuring that there is a sufficient barrier between the potable water supply and any potentially contaminated water. The air gap is a physical separation that prevents backflow, which could occur if there was a drop in water pressure, causing non-potable water to potentially flow back into the drinking water supply. By ensuring that the air gap is at least the same diameter as the inlet, foodservice establishments adhere to best practices for plumbing safety and maintain compliance with health regulations. This creates a reliable safeguard against the transfer of contaminants, thereby protecting the safety and quality of the food served.