Irrirgation system winterization / blowout

For the past 3 days the maintenance team has been hard at work winterizing and blowing out the irrigation system.  It is a long process to blow compressed air through all the pipes and heads to prevent any parts from freezing and cracking over the winter months.  We use two large compressors to fill the system with air and then go through each head blowing out the water til it is clear.  Everything went very good this year with no issues and everything is now ready for freezing temps.  Here are some pictures of the process the last 3 days.

One of the compressors hooked up to one of the pump stations