Irrigation Backflow Prevention

Ok...today I'm going to vent. It is irresponsible and dangerous for an irrigation company to NOT install a backflow prevention device on a new irrigation system. The key to prevent contaminants such as fertilizers, pesticides and animal waste is simple...BACKFLOW PREVENTION. Valves are not sufficient to stop backflow and water pressure is not always constant enough to prevent backflow. More counties and cities are setting standards for backflow prevention and they need to. In the last two weeks alone, I've seen 6 systems without backflow (installed in the last 5 years) and my techs have seen even more. Don't gamble with your health. You can have a beautiful lawn and be safe about it. BACKFLOW PREVENTION is not only the law but THE SMART THING TO DO.