Common use of Air-Vacuum Control Clause in Contracts

Air-Vacuum Control. ‌ An air-vacuum control (AVC) device is required on any City Water main where a “high spot” exists at any point between lower portions of the main. A “high spot” is any location at which the main rises more than one-half (.5) times the nominal pipe diameter, and then descends to the previous elevation.

Air-Vacuum Control. ‌ An air-vacuum control (AVC) device is required on any City Water main where a “high spot” exists at any point between lower portions of the main. A “high spot” is any location at which the main rises more than one-half (.5) times the nominal pipe diameter, and then descends to the previous elevation.