This course outlines the concepts of cross-connection and backflow; and the techniques and equipment used to protect cross-connections and to prevent backflow. It covers the components, operation, applications and testing basics for eight types of backflow prevention devices including the Air Gap, Barometric Loop, Atmospheric Vacuum Breaker (AVB), Hose-Bibb Vacuum Breaker (HBVB), Pressure Vacuum Breaker (PVB), Double Check Valve Assembly (DCVA), Residential Dual Check Valve (RDCV) and Reduced Pressure Zone Device (RPZD). Understanding these concepts is essential to protect public water supplies and to comply with US federal and state regulations.
At the completion of this course, the student will be able to:
- Define cross-connection, backflow, backsiphonage and backpressure.
- Identify common cross-connections and explain why cross-connection control and backflow prevention are necessary.
- List potential causes for backsiphonage and backpressure and describe the conditions needed for backflow to occur.
- List and explain methods for backflow prevention.
- List eight types of backflow prevention devices and for each type:
- Identify its schematic.
- Explain its operation.
- List its advantages and disadvantages.
- Describe its application(s).
- List and explain indicators of backflow.
- Describe the methods for mitigating backflow events.
- Explain the regulatory basis for cross-connection control programs.
- Describe a typical backflow prevention program.
- Demonstrate this knowledge on a multiple choice final exam