How can backflow into the City water system be prevented?

The City of Healdsburg recognizes 3 methods of backflow prevention:

  • Air Gap (a physical separation with disconnected and capped plumbing/piping)
  • Double Check Detector Check Assembly (Dedicated Fire Systems Only)
  • Reduced Pressure Assembly

The method of backflow prevention required is based on the degree of hazard that the property and the various uses within the property represent to the city water supply. For more information, download a table showing the required backflow assembly for typical applications.

Show All Answers

1. What is a cross-connection?
2. How can I prevent a cross-connection?
3. What is backflow?
4. How can a backflow occur?
5. What is back-pressure?
6. What is back-siphonage?
7. Why do water suppliers need to control cross-connections and protect their public water systems against backflow?
8. How can backflow into the City water system be prevented?
9. How do I prevent a cross-connection with my recycled water or rainwater irrigation system?
10. What is a backflow prevention assembly?
11. Who is responsible for the testing and maintenance of the backflow prevention assembly?
12. How do I find a city recognized tester?
13. How do I get added to the city's recognized tester list?