Turn off the water supply to the sprinkler system
Shut down the controller or switch it to off mode
Drain the system using manual drain valves if available
Open all test cocks and drain valves to release remaining water
Blow out the lines with compressed air if required for your system
Start with the zone farthest from the compressor and work backward
Run each zone until only air comes out
Do not exceed the recommended air pressure for your sprinkler system
Shut off the compressor after all zones are cleared
Drain and disconnect backflow preventers if applicable
Insulate exposed above-ground pipes, valves, and backflow devices
Remove and store hose-end timers, hoses, and detachable accessories
Check sprinkler heads for damage and replace if needed
Set the controller to winter mode or unplug it if appropriate
Verify all valves are fully closed and system components are protected from freezing