What is meant by 'backflow' in the context of water safety?

'Backflow' in the context of water safety refers to the reverse flow of contaminants into a drinkable water supply. This phenomenon can occur when there is a sudden drop in water pressure in the system, which could allow dirty water or other contaminants to siphon back into the clean water supply.

Backflow presents a significant health risk because it can lead to the contamination of potable water with harmful substances, making it unsafe for consumption. Preventing backflow is essential for maintaining the safety and integrity of drinking water, which is why proper backflow prevention devices and practices are mandated in plumbing systems. Understanding how backflow can compromise water safety is crucial for anyone involved in food service or facilities management.