A: "Backflow" is the undesirable reversal of the flow of water and other substances from any source into the distribution pipes of the drinking water system. There are two types of backflow conditions: back pressure and back-siphonage. Backflow puts our drinking water at risk of contamination from pollutants and/or hazardous chemicals​.

A: Backflow prevention assemblies are designed to protect our drinking water. These assemblies prevent pollution or contamination from entering the public water system through cross-connections to piping systems that carry anything other than safe, approved drinking water. There are many types of backflow prevention assemblies dependent on the application. These assemblies are Double Check Valve Assembly (DCVA), Pressure Vacuum Breakers (PVB), Spill Proof Vacuum Breakers (SPVB) and Reduced Pressure Principle Zone assembly (RP/RPZ). These assemblies are able to protect against both contamination and pollution resulting from either backpressure or back-siphonage. To ensure continued proper operation, backflow assemblies are tested annually depending on their application and your local codes.

A: Cross-connection control through backflow prevention is required in many applications. Most multi-family housing, as well as all commercial and industrial properties, and irrigation water meters are required to have backflow prevention assemblies. These assemblies, depending on the application, are tested on a regular basis. Check with your local City or Water Utility Company.

A: If you have received a backflow test notice from your Water District, you must have the test performed within the specified time period. Even if you don't receive a test notice, it is advised to test each backflow once a year.

The TCEQ requires Water Districts to have cross-connection control programs (CCCP) in place. These programs require that certified backflow testers check all backflow assemblies at the time of installation, annually thereafter (if identified as Health Hazard), and after any repairs or relocation. Backflow prevention assembly testers are private contractors who must submit a report to the water district following a test. All Water Districts require technicians to be certified in their service areas.

A: The answer to this question depends on the water district supplying your property. If for some reason you do not test your backflow assembly you may be cited and/or fined for non-compliance. Also, your water service may be suspended or terminated to protect the public water system. At Garvin Irrigation Services, we have systems in place to help our customers avoid these problems and penalties.​