What is an air gap separation device?

An air gap separation device serves as a crucial barrier in a water distribution system by ensuring that there is a physical separation between a potable (drinking) water supply and any non-potable (unapproved) water systems. This separation prevents contaminants from entering the drinking water supply through backflow, which can occur due to changes in pressure or other factors. The air gap is typically established by creating a vertical distance between the water outlet (such as a faucet) and the flood level of the receiving vessel (such as a sink), effectively eliminating any direct connection where contaminants could siphon back into the potable system.

This device is essential for maintaining water safety and complying with health regulations designed to protect the public from potential hazards linked with cross-connections. In practice, air gaps are commonly used in various applications, including wastewater treatment and irrigation systems, to safeguard drinking water supplies from pollution.