What is the purpose of a backflow prevention device?

The purpose of a backflow prevention device is to prevent the reverse flow of contaminated water into the potable water supply. This is crucial for protecting public health, as backflow can occur when there is a significant drop in pressure in the main water supply, which may allow contaminants from sources such as irrigation systems, industrial operations, or sewage systems to flow back into the clean drinking water supply.

By using backflow prevention devices, the integrity of the potable water system is maintained, ensuring that the water consumers receive is safe and untainted by harmful substances. This protective measure is vital in any water distribution system, particularly in systems where the possibility of contamination is higher.