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Thursday, June 27th 2013, 6:58am

A Backflow Device... would it reduce pressure in water lines?

What does a backflow device really do? If it was installed incorrectly would it reduce the pressure in my water lines? I can only get my zone to operate by manually turning the top screw on the valve, this will allow the sprinkler heads to pop up and function. I have two other zones that function just fine.[align=auto]

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