Backflow Testing and Prevention

A backflow device is a precautionary device approved by the State Office of Drinking Water and the University of Southern California (USC) Hydraulic Research Section that provides protection from hazards getting back into the City water system.

Such types of hazards could be a separate irrigation system on a property, a business that uses chemicals, a property with a sewage lift station, or an unknown potential. All of these are considered “high hazard” situations and require a reduced pressure backflow device. This device is required per State Health Code Title 17.

There are also “low hazards” such as properties with wells, pumps, or residential fire sprinkler systems. These low hazards are required by State Health Code Title 17 to have a double check (DC) backflow device. All these situations are considered to be hazardous because chemicals or contaminated water could possibly back siphon into the water system. A device is required to protect the integrity of the city’s water system. Backflow assemblies are mechanical devices that may fail over time and require repair or replacement.

How often must my backflow device be tested?
A certified backflow tester must test your device once a year. The annual testing requirement is mandated by the California Code of Regulation, Title 17.

Pumpman Norcal’s has a certified tester on staff who has worked with all municipal water systems in Sonoma County. Contact the Pumpman Norcal office to set up your annual backflow prevention test.