How to properly blow out a sprinkler system before winterizing it?

To properly blow out a sprinkler system before winterizing it, you should use an air compressor to blow out any remaining water in the system. Start by shutting off the water supply and attaching the air compressor to the system. Open the valves one at a time to allow the air to push out the water. Make sure to blow out each zone until no water comes out. This will help prevent freezing and damage to the system during the winter.