What is backpressure?

Backpressure is created when pressure in a nonpotable system, such as in a recirculating system containing soap, acid, or antifreeze, exceeds that in the potable system that provides make up water to the nonpotable system. This can force the potable water to reverse its direction of flow through the cross connection. Nonpotable substances can then enter the potable water system.

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1. What is backflow?
2. What causes backflow?
3. What is backsiphoning?
4. What is backpressure?
5. How can backflow be prevented?
6. What is a backflow assembly?
7. How is an assembly approved?
8. Who is required to have a backflow prevention assembly?
9. How do I know if I need a backflow prevention assembly?
10. Is there a general compliance schedule and process?
11. Who installs the backflow prevention assembly?
12. Where should a backflow prevention assembly be located?
13. Who is responsible for the testing and maintenance of the backflow assembly?
14. Who is BSI, and how do I contact them to submit test results?