What is Backflow?

ASSE logo defines backflow as:

The potentially dangerous reversal of the flow of water from its intended direction in any pipeline or plumbing system. A cross-connection is a physical connection between two separate piping systems; one containing potable water and the other containing water of questionable safety. Backflow can allow drinking water in plumbing systems to become contaminated and unusable.

ASSE backflow
What are backflow preventers?
Backflow preventers are mechanical plumbing devices and assemblies installed in plumbing systems to prevent water from flowing backward in the system. A properly tested and maintained backflow preventer can reliably prevent water of an unknown quality from contaminating a community’s water system.

One thought on “What is Backflow?

  1. I appreciate the information on backflow and what it is. I had no idea that this was a possible issue for water systems, but when you think about the fact that some water can contaminate other water it makes sense. My brother is doing some plumbing in his house, I will be sure to share this with him.


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