Backflow assemblies and devices have parts that can break down and wear out, just like the parts on your car. By having the backflow tested annually, you will help to ensure the drinking water supplied to your facility remains safe. Because backflow assembly parts can break down and wear out, most cities have created by-laws to help ensure the safety of our drinking water. At Crystal Greens Landscape, we have certified backflow assembly testers on staff, who have attended a rigorous training program and are certified to inspect, test and repair all backflow assemblies and devices.