The purpose of backflow prevention is to safeguard the potable water supply from contamination. Backflow occurs when the flow of water in a plumbing system reverses, causing non-potable water or substances to flow back into the clean water supply. This can happen due to changes in water pressure or when a cross-connection occurs between the potable water system and a source of contamination.
Backflow can introduce harmful substances, such as chemicals, bacteria, or other pollutants, into the drinking water supply, posing a serious health risk. Backflow prevention devices are installed to prevent this reverse flow and ensure that the potable water remains safe and uncontaminated.
These devices work by creating a physical barrier or employing check valves that only allow water to flow in one direction, preventing any potential backflow. Regular testing, maintenance, and installation of backflow prevention devices are essential to ensure their effectiveness and compliance with plumbing codes and regulations.
The purpose of backflow prevention is to protect public health by maintaining the integrity and purity of our drinking water supply.