Water Distribution · Cross-Connections
What Is an Air Gap?
An air gap is an unobstructed vertical separation between a potable outlet and the flood-level rim of a receiving vessel. When properly sized and maintained, it provides a physical break in the flow path.
Inspect outlet position, flood-level rim, overflow condition, splash control, nearby hoses, and modifications. The required separation comes from the applicable plumbing or cross-connection standard.
A funnel, loose hose, or screened opening is not automatically an air gap. Raising the receiving vessel or adding an extension can eliminate previously acceptable separation.
If stored materials block the view of an air gap, clear access and verify the installation before relying on it. Document modifications and refer questionable geometry to qualified staff.
Key point: An air gap is an unobstructed vertical space between an outlet and the vessel's flood-level rim. A funnel or loose hose is not automatically an air gap.
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Water Distribution Fundamentals
This page comes from the course. It covers mains and valves, storage, pumps and pressure, water quality, backflow, main work and daily operations, one step at a time, with short knowledge checks and a certificate of completion.
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