We are listed on the City of Saskatoon. Licensed Backflow Testers List. Backflow prevention is critical for the protection of our potable water system. All commercial buildings must have a backflow prevention device installed and tested annually. To deliver the best water possible, the City of Saskatoon has a Cross Connection and Backflow prevention program in place. This protects everyone from harmful or hazardous products entering our clean water systems. As a building owner / operator, it's YOUR responsibility to ensure that your backflow device is installed and operating properly. This requires certified & licensed tests done every year. Our WCB "Letter of good standing" on request. As Licensed and Certified backflow device tester's we're here to help. more... See more text