What does the term "cross-connection" refer to?

The term "cross-connection" refers to a direct connection between potable (safe for drinking) and non-potable (unsafe for drinking) water systems. This situation poses significant health risks, as it allows contaminants from non-potable sources to potentially enter the drinking water supply, leading to serious health hazards for consumers.

Understanding cross-connections is crucial for plumbing professionals because they must ensure that systems are properly designed and maintained to prevent such connections. Building codes and regulations typically have strict guidelines to eliminate or control cross-connections to protect public health. Recognizing the importance of this term is essential for any plumbing practitioner, as it emphasizes the responsibility to maintain safe and clean water supplies.