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Old 10-01-2012, 08:38 PM
Mdirrigation Mdirrigation is offline
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Join Date: Dec 2003
Location: Maryland
Posts: 1,377
The master valve is part of the sprinkler system , The backflow preventer is part of the house plumbing . Anything on the supply side of the backflow is plumbers territory , anything past the backflow is sprinkler guy territory . having a MV before the backflow , it would have to be installed by the plumber , and serviced by the plumber.
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