It helped. We had several days of cold weather in Texas when it was well below freezing and my backflow preventer blew. It was this thing. A replacement was ordered so I had to wait but when it arrived I just unscrewed the old one and screwed in the new one - fixed. I had to screw it in twice as the o-ring didn't fit properly the first time. The replacement couldn't be simpler and there are detailed instructions online.
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