I have best results of turning it off and use my own common sense. My system comes on Tues. and Fridays. If it rains Monday, and my rain guage shows enough water, I'm turning it off, don't need watering the next day. If my sprinklers do water, it provides .500" of water so if it rains near that amount I will save running the system and the money it costs which is quite expensive. It's like playing a game and I enjoy it.
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Les
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