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When there is a sudden reduction in water pressure in the public drinking water distribution system, such as during fire fighting or when a water main breaks, water flow can potentially be reversed. This could create a suction effect, possibly drawing contaminated water into the drinking water system.

Back to Backflow Index

1. Can you show an illustration of how back flow occurs?
2. Why is Backflow Prevention so important?
   
3. What causes Backflow?
4. What is Backsiphonage?
5. What is Backpressure?
6. How can Backflow be prevented?
7. What is a Backflow Prevention Assembly?
8. How is an assembly approved?
9. How do I know if I need a backflow prevention assembly?
10. Is there a general compliance schedule and process?
11. Who can install a backflow prevention assembly?
12. Where should a backflow prevention assembly be located?
13. Who owns and is responsible for testing and maintenance of the backflow prevention assembly?
    
14. How do I find an Approved Certified Backflow Technician?
15. How often do I need to have my backflow prevention assembly tested?
16. Who is responsible for obtaining all required permits?