What is an air gap in irrigation terminology?

An air gap in irrigation terminology refers to a safety feature that separates a water supply outlet from potential contamination. This physical separation is crucial in preventing backflow, which can occur when there is a drop in water pressure in the supply line. By maintaining an air gap, it ensures that water in the irrigation system cannot siphon back into the potable water supply, protecting it from pollutants and harmful substances that may be present in the irrigation water. This practice is essential in maintaining safe drinking water standards and is often required by regulations governing water systems. The air gap is typically a specified distance that must be maintained between the outlet of the water supply and the highest point of the irrigation system.