What does the term “cross-connection” refer to in plumbing?

The term "cross-connection" specifically refers to a physical connection between potable (drinking) water and non-potable (non-drinkable) sources. This definition is crucial in the context of backflow prevention, as cross-connections can lead to contamination of the potable water supply. When a cross-connection exists, there is a risk that pollutants or contaminants from the non-potable source can flow back into the clean water system, especially if there is a drop in pressure in the potable supply, creating a backflow situation.

Creating awareness around cross-connections is vital for maintaining the safety and quality of drinking water. Therefore, understanding this term is fundamental for anyone involved in plumbing or water management, particularly in the context of regulations and standards designed to prevent water supply contamination.