How do I prevent backflow?

Backflow prevention assemblies or an air gap can be used to prevent backflow into potable water systems. 

Without these barriers, water that is no longer safe for consumption, such as water from pools, irrigation systems, restaurants, and medical facilities, could travel into the City’s water supply and contaminate the drinking water.

Typically, backflow prevention assemblies are required for plumbing system connections that contain chemicals or industrial fluids, irrigation systems, fertilizers, or auxiliary water sources (including reclaimed water).

Show All Answers

1. What is backflow?
2. What is the difference between potable and non-potable water?
3. How do I prevent backflow?
4. How do I get my backflow tested?
5. What if my assembly fails the required test?
6. What are testing and tester registration requirements?