1. Close the valves on your backflow device.
  2. Now you can go inside and  turn  on the water to your irrigation system.

Now I can test your device and not get water in your irrigation system. This way you do not need to get your system winterized. When I am done testing your device, turn the water off in your basement and drain the water out of the line that goes out to the backflow device.

 

Turn water On