What is the risk associated with a cross connection in plumbing?

The risk associated with a cross connection in plumbing primarily involves water contamination. A cross connection occurs when there is a direct link between a potable water supply and a source of contamination. This can happen, for example, when a non-potable water supply, such as irrigation water or wastewater, is improperly connected to drinking water lines.

If backflow occurs—whether due to changes in pressure in the system or a malfunction—contaminants can enter the clean water supply. This poses serious health risks, as the contaminated water could contain hazardous substances or pathogens that could lead to illnesses. The protection against cross connections is a critical aspect of plumbing safety and water quality management.

In terms of the other options, while issues like pipe bursting, flow restriction, and increased water temperature are valid plumbing concerns, they do not directly relate to the risk that a cross connection presents. These concerns pertain more to the structural and operational integrity of the plumbing system rather than the integrity of the water itself.