In plumbing terminology, what does the term 'backflow' refer to?

Backflow refers to the situation where the normal direction of liquid flow in plumbing systems is reversed. This phenomenon can occur due to changes in pressure within the system, which can lead to contaminated water flowing back into a clean water supply. It is essential to understand that backflow poses significant health risks, as it can cause pollutants to enter potable water systems, making them unsafe for consumption.

Effective backflow prevention is crucial in plumbing design and maintenance to protect drinking water from contamination. Devices such as backflow preventers are often installed in plumbing systems to mitigate this risk. Understanding the implications of backflow helps plumbing professionals ensure the safety and functionality of water supply systems.