What is a Backflow System?
If your sprinkler system is connected to a domestic (city) water supply, you will have a backflow system. Backflow systems are mandated by the State of Idaho for protection on all sprinkler systems. They serve as a barrier to prevent contamination from entering the domestic water supply from the sprinkler system. Backflow assemblies (see diagram below) may be located above or below ground level and, like sprinkler pipes, must be properly winterized for protection from freezing and breaking. This is your most vulnerable part of your sprinkler system because generally the piping is above ground and exposed to the elements. If you have pressurized irrigation to water your lawn, you will not have a backflow system.
