What is a connection between a possible water supply and a non-potable water supply called?

A connection between a possible water supply and a non-potable water supply is known as a cross connection. This term is important in the context of water safety and public health, as it refers to any physical link between two different piping systems, one of which supplies potable water (safe for drinking) and the other that contains non-potable water (not safe for drinking or use).

Cross connections pose significant risks because, if not properly managed, they can lead to contamination of the potable water supply through backflow. Backflow can occur when there is a drop in water pressure, allowing non-potable water to flow into the clean water system.

Understanding cross connections is vital in water infrastructure management and for implementing measures such as backflow prevention devices. This ensures the safety and quality of the drinking water supplied to the community, highlighting the importance of recognizing and addressing cross connections in plumbing systems.