What is a cross-connection?
A cross-connection is any temporary or permanent connection between the potable (e.g., drinking) water system and another source containing non-potable water or other substances that could contaminate your drinking water if a backflow condition occurs.

An example of a temporary connection could be a garden hose attached to a sink or a spigot with the end of the hose submerged in a tub full of detergent. An example of a permanent connection could be the water supply line to the boiler of a hot water heating system. Please call 707-431-3346 for more information

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. What is a backflow prevention assembly?
10. Who is responsible for the testing and maintenance of the backflow prevention assembly?
11. How do I find a city recognized tester?
12. How do I get added to the city's recognized tester list?