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Backflow Program
The backflow program for the City Of Covington is to protect the potable water supply of its customers.  It protects the users from numerous possibilities of contamination, which may 'backflow' or 'back-siphon' into the water supply system.
It is in place to eliminate cross-connections (actual or potential) and to maintain a continuing program of cross- connection control.
Backflows can occur two ways:
 1)   Negative pressure causes a 'back-siphon'. Negative pressure creates a partial vacuum in a sealed tube or distribution system that can siphon liquid into a potable water system. Remember, liquids will flow toward the point of lowest pressure.
 2)   Superior pressure causes backpressure backflow. A pump, boiler system, can cause superior pressure or elevated storage tank located in a non-potable system.
Breaks in a water main or fire hydrant use are two examples that may cause a system to backflow. These situations can happen without notice and therefore require continuous prevention.
Prevention is maintained through:
1)   Careful considerations of water supply connections.
2)   A system of valves set up for protection. 
 The type of valve is determined by the hazard it protects.
 3)   Regular inspection/testing of backflow prevention valves.
 4)   Public education. 
  • What is cross connection
  • Backflow Test Forms
  • Backflow Tester List
  • Installation for Double Check Backflow Device
  • Installation for Double Detector Check Backflow Device
  • Installation for 3/4 to 3 inch RPZ Backflow Device
  • Installation for 10 inch RPZ Backflow Device
  • Installation for Air Gap

 Useful Documents

Air Gap.pdf
5/9/2014 4:54 PM
Backflow Test Form.pdf
5/9/2014 4:54 PM
Double Detector Check.pdf
5/9/2014 4:54 PM
5/9/2014 4:54 PM
Ten Inch RPZ.pdf
5/9/2014 4:54 PM
5/9/2014 4:54 PM
What is Cross Connection.pdf
5/9/2014 4:54 PM