What is the minimum air gap required to prevent a cross connection?

The minimum air gap required to prevent a cross connection is one foot. An air gap is a physical separation between the source of contamination and the piping carrying potable water. This distance is critical in ensuring that any potential backflow or contamination from non-potable sources cannot reach the clean water supply. A one-foot air gap provides a sufficient buffer to effectively prevent any back siphonage or pressure fluctuations that could compromise the safe drinking water.

This regulation is based on guidelines established by various health and safety organizations, emphasizing the importance of maintaining a safe distance to protect public health. By implementing a one-foot air gap, water systems can significantly reduce the risk of cross-connection issues that could endanger consumers.