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    Sprinkler winterize through back flow preventer test port not working. HELP

    Hi, I am trying to winterize my sprinkler using instruction in following thread. http://www.garagejournal.com/forum/showthread.php?t=221613&highlight=sprinkler My setup is similar to the picture shown. I was trying with test port 2. First time i tried it was making a loud noise near BFP and...
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