Quote:
Originally Posted by thawk02
you do not have to blow the lines out.just shut off the main valve & open the valves that are under cover.the valves are above ground.
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It sounds like you have a pretty good tolerance for risk, and the consequences that come with it.
The valves under the cover can be one of the first things to freeze along with the sprinkler heads, depending on their location. If located on the north side of the house, they will freeze more quickly.
Personally, I prefer the blow out method. You can do this yourself, but the compressors most home owners have access to have too little volume and too much pressure to get the job done properly. Be careful in you selection of methods.