Which statement best describes a cross connection?

A cross connection is best described as a link between drinking water and potentially unsafe water. This definition is crucial in the context of water safety and plumbing systems. Cross connections can occur when there is a physical connection between a potable water supply and a source of contamination, which could lead to backflow. Backflow is the undesired reversal of flow in a water system, posing serious health risks as it can introduce harmful pollutants or pathogens into the drinking water supply.

Understanding cross connections is vital for preventing contamination of potable water systems. It is important to implement protective measures, such as backflow prevention devices, to safeguard against these risks. This definition emphasizes the potential dangers associated with inadequate plumbing systems and highlights the importance of maintaining separation between safe and unsafe water sources to ensure public health.