What is the primary function of backflow preventers?

The primary function of backflow preventers is to prevent the reverse flow of contaminants into the water supply. Backflow occurs when there is a sudden change in pressure within the water system, potentially causing water to flow in the opposite direction. This situation can introduce harmful contaminants from non-potable sources back into the clean water supply, posing a significant health risk.

Backflow preventers are designed to create a physical barrier that stops this reverse flow, ensuring that the water remains safe and free from pollutants. They are crucial components in maintaining water quality standards and protecting public health. By preventing contaminated water from entering the potable water system, backflow preventers play a vital role in safeguarding the integrity and safety of the drinking water supply.