What is a backflow assembly?
: Backflow occurs when the water pressure in the distribution system drops below the water pressure at the end of the service. This can occur when the distribution system is shut down for any reason (for instance, when there is a water main break), and it creates a situation where materials or contaminants can enter the distribution system.

A backflow assembly (also known as a Reduced Pressure Principle Assembly, or RPPA), is a device that reacts to the pressure drop and prevents material or contaminates from entering the distribution system if a pressure drop occurs.

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1. Where can I get sandbags?
2. Who do I call if I have questions about my utility bill, or if I need to have my utility service activated or disconnected?
3. What utility services does the City provide?
4. Who provides garbage, greenwaste, and recycle pick-up for Shasta Lake residents?
5. What is an Encroachment Permit and why is it needed?
6. Do I need to obtain an Encroachment Permit to replace my sidewalk or driveway approach?
7. I want to install a fence behind the sidewalk or in the public right-of-way. Do I need to obtain an Encroachment Permit?
8. Can I place a temporary container in the public right-of-way?
9. How long is an Encroachment Permit valid?
10. What happens when work is performed within the public right-of-way without a permit?
11. I want to report a pothole that needs repair. Who do I call?
12. How many miles of streets does the City maintain?
13. Who maintains I-5 and/or Shasta Dam Boulevard (State Route 151)?
14. Does the City maintain a Pavement Management System?
15. Does the City have a street paving program?
16. Can I request that a certain street be paved?
17. Who do I call about a problem with street lights?
18. My water tastes or smells odd. What should I do?
19. Where does the City’s maintenance responsibility for the water system stop?
20. What is a backflow assembly?
21. Why do backflow assembly (RPPAs) have to be tested annually?
22. Where does the City’s maintenance responsibility for the wastewater system stop?
23. My service line does not drain properly. What should I do?
24. I recently had a sewage backup in my house. What caused it and how do I handle the situation?
25. What can I do to keep my service line in good shape?