If you don’t empty your sprinkler lines of water, when winter grabs the ground and freezes it solid, so too will the water in your sprinkler lines freeze. When that happens, odds are good that the sprinkler pipes will crack as the water inside the lines turns to ice and expands. A very powerful force, indeed.
Rather than re-write what’s already written, if you are looking for information about what type of air compressor and connector you need to clear your sprinkler lines, feel free to visit that page on my compressed air information website. You can find it right here!