What if I want to test backflows outside of Durham?
The City of Durham has a reciprocity agreement with Raleigh, Charlotte, Greenville, Fayetteville, and NC Rural Water. If a certification or recertification certificate is obtained at any of these schools, the City of Durham will allow you to test in Durham after attending an 2 hour orientation. The same goes if you are originally certified in Durham and you wish to test at any of the above jurisdictions; they will accept your certificate from Durham. Keep in mind: you still have to seek approval from each municipality before you starting testing; they may need things like a copy of your certificate or calibration data.

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1. What types of backflow conditions exist?
2. What is Backsiphonage?
3. What factors can cause backsiphonage?
4. What is backpressure?
5. What factors can cause backpressure?
6. What is a cross connection?
7. What is the most common form of a cross connection?
8. What is an Atmospheric Vacuum Breaker (AVB)?
9. Will an Anti-Siphon Vacuum Breaker protect against backpressure?
10. What is continuous pressure?
11. Can an AVB be used under continuous pressure?
12. What is a Hose Bibb Vacuum Breaker (HBVB)?
13. Can I tie my lawn irrigation/sprinkler system to my outside AVB or HBVB?
14. If I have an existing lawn irrigation/sprinkler system do I need a backflow preventer?
15. If I have a new lawn irrigation/sprinkler system do I have to have a separate irrigation meter?
16. When do I need to get a backflow permit? Do I also need a Plumbing Permit?
17. As a homeowner, can I install my own backflow preventer?
18. Do I need a plumbing permit to install a backflow preventer?
19. What if I have a commercial property or I just don’t feel comfortable doing the work myself, who can I hire?
20. How do I become a certified backflow tester in Durham?
21. Are re-certification classes every 2 years necessary?
22. Why can’t we have one universal State backflow testing form for each jurisdiction?
23. What if I want to test backflows outside of Durham?
24. Why do I have to be a properly licensed contractor to test backflows in Durham?
25. How often do I have to test my backflow preventer?
26. What if I have a temporary use that requires a backflow preventer assembly, do I have to get a permit, inspection, etc.?
27. How do I pay for backflow permits, re-inspection fee, CCC Plan Review, Work without permit, CCC Class Enrollment, and any other associated fee with Cross Connection?