PSI Certified Backflow is a company that provides expertise in the backflow industry that includes testing certifications, repairs, new installations, and replacements. PSI Certified Backflow is located in the city of Irvine, CA. It serves all surrounding counties in Southern California, such as Ventura, Los Angeles, Riverside, San Bernardino, Orange County, and San Diego. Since 2007, PSI Certified Backflow has been serving the backflow industry and our customers to the highest level of service. We strive to make the customer experience easy and effortless from start to finish.