What is "backflow" in plumbing systems?

Backflow in plumbing systems refers to the unwanted reversal of flow in a pipeline. This phenomenon can occur when there is a change in pressure within the system, allowing potentially contaminated water to flow back into the clean water supply. Backflow can pose serious health risks, as it can introduce pollutants or pathogens into drinking water sources.

In plumbing design, backflow prevention devices are commonly used to ensure that water flows in only one direction, thereby maintaining the integrity of the potable water supply and safeguarding public health. Understanding backflow is critical for maintenance technologists, as they must ensure that all systems are adequately protected from this risk.