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I have a sprinkler system that the breaker valve is blowing off water whenever I turn on zone 3. I have 6 zones and it only does it on 3. If I manually open zone 3 very slowly then 3 works fine but if I let the timer do it it will blow off.

  • Most likely the vacuum breaker is defective. – jwh20 May 27 at 11:27

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