What role does an air break serve in a plumbing system?

An air break plays a crucial role in preventing backflow within a plumbing system. Backflow occurs when water flows in the opposite direction from its intended flow, which can lead to contamination of the potable water supply with unsafe or non-potable water. An air break is a physical separation between the water supply and a potential contamination source, such as a sink or a drain.

By incorporating an air break, the plumbing system ensures that there is a gap allowing airflow, which disrupts any potential reverse flow that could carry contaminants back into the clean water supply. This is particularly important in environments like kitchens or laboratories where the risk of contamination is higher. Thus, the primary function of an air break is to safeguard public health by maintaining the integrity of the water system and preventing serious health hazards associated with backflow.