Print this fact sheet by M. Higgins and C. Swift * (10/14) Revised by Kurt Jones** Quick Facts…. Prepare your sprinkler system for winter by expelling all the water from the irrigation system and equipment. Do not trust manual or automatic drain valves. The system should be blown out with pressurized air. To determine the … Continue reading Home Sprinkler Systems: Preparing Your Sprinkler System for Winter – 4.719