You can find detailed instructions here: http://www.sprinkler.com/info/winterization
Basically you attach the air compressor to your main sprinkler line after your backflow preventer, turn on a zone and then the air compressor. But I would definitely look at that link to make sure you are doing it right.
Turn off water supply. Disconnect line to sprinkler system. Connect air compressor and blow water out of system.
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You can find detailed instructions here: http://www.sprinkler.com/info/winterization
Basically you attach the air compressor to your main sprinkler line after your backflow preventer, turn on a zone and then the air compressor. But I would definitely look at that link to make sure you are doing it right.
Turn off water supply. Disconnect line to sprinkler system. Connect air compressor and blow water out of system.