It's been a while since I've blogged about this topic but it seems I need to do so again. About 5 years ago the state said you must install a backflow prevention device and rain sensor. Backflow prevention is super important for the safety of your family and the drinking water supply in general. This photos is of a double-check backflow device which is provides the best protection for your irrigation system and is testable. Many places south of Atlanta require these types of backflow devices and annual testing for your protection.
