All about Backflow
If you want to learn more about this issue please read
50 Cross-Connection Questions, Answers & Illustrations
Please note that this is a general information sheet about Cross-connections and backflow. Even though it discusses sprinkler systems, Timber Lakes Water S.S.D. strongly discourages outside watering. The natural plants found in and around the area do not require extra watering. The only exception is if you need to use culinary water to establish plants around your home.