What is backflow?

Backflow is the flow of water or other liquids, mixtures or substances, under positive or reduced pressure into the distribution pipes of a potable water supply from any source other than its intended source. Backflow is caused by either backsiphonage or backpressure. Backsiphonage occurs when a flow of used, contaminated, or polluted water from a plumbing fixture or vessel enters into the public water system, often due to negative pressure in a pipe. It is important to note that a drop in pressure is out of your control and can occur at any time. Backpressure occurs when the pressure is greater than the pressure in the potable water distribution system.  

Show All Answers

1. Why is the City doing this now?
2. What is backflow?
3. What is Cross Connection?
4. What is the most common form of cross connection?
5. What is a backflow preventer and why are they needed?
6. Who needs a backflow preventer?
7. How often does my backflow preventer need to be tested?
8. Who is responsible for the testing and maintenance of the backflow preventers?
9. Who can test backflow preventers?
10. Who can repair backflow preventers?
11. What is a TRAC # ?
12. How much will a backflow test cost?
13. What happens if my backflow test fails?
14. What happens if I don’t have my assembly tested?
15. Who can I contact for additional information on the City of Fayetteville’s Cross-Connection Control and Backflow Prevention Program?