No, Netro will not water your yard during winter. However, winterization requires shutting off the main valve and blowing out the water, which is beyond the capability of Netro Sprite. You could google to find the instruction for winterization: e.g. https://www.familyhandyman.com/landscaping/how-to-winterize-a-sprinkler-system/ https://www.youtube.com/watch?v=s3YRbJYmvgA
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