Backflow FAQ

Frequently Asked Questions

At Backflow Devices Testing & Repair, we know that you may have a lot of questions about backflow prevention and testing. That's why we've compiled this list of frequently asked questions to help you understand what we do and why it's important. We're your local specialists for this type of service and we put a priority on protecting drinking water. Should you have other questions or want to schedule an appointment, give us a call at (706) 965-5951. Our Ringgold, GA office serves Northwest Georgia and Southeast Tennessee, including Dalton and Chattanooga.

What is backflow?

This happens when the flow of non-potable water is reversed and goes back into the drinking water system. There are two types: backpressure backflow and backsiphonage.

Why is it important to protect against it?

It can make drinking water in a public water system or a consumer's water system unsafe to drink. Everyone should take precautions to keep the water supply clean.

What is backpressure backflow?

This happens when downstream pressure is greater than the upstream pressure in a water system. This may happen when there's a water main break, fire hydrants are used, or water lines are flushed.

What is backsiphonage?

This is caused when there's negative pressure (aka a vacuum) in a water system. This can happen because of the same reasons as backpressure


What is a cross-connection?

Cross-connections are the places where a drinking water system is connected to systems containing non-potable water. This includes cooling systems and irrigation systems.

What are backflow preventers?

This is a device that prevents backflow by creating a barrier. The main types are double check valve assemblies, pressure vacuum breaker assemblies, and reduced-pressure principle assemblies.

What is an air gap?

Air gaps are one way to prevention method. It creates a physical separation between a water supply and the flood-level rim of a receiving vessel. Although this is one of the best ways to protect against a problem, it isn't always practical.

Learn more…

Click HERE to learn more about backflow. Or visit the American Backflow Prevention Association website for more information.