Here in the Piedmont region of North Carolina we don’t have to blow out irrigation systems to prevent water freezing in the nozzles and below grade. But I do have a booster pump with plumbing quick connects that I remove from the system and store in the garage each winter. I also just unplug the irrigation controller completely and take out any batteries the controller may have for the winter. No muss, no fuss, no dead batteries, no vampire electrical drain, easy peasey.
