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What type of backflow preventer is required for lawn irrigation systems?

April 26, 2017backflow irrigation lawn Preventer SYSTEMS type

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What type of backflow preventer is required for lawn irrigation systems?

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A. The following backflow preventers are approved: Atmospheric type vacuum breaker (must be installed 6 inches above highest head with no valves located downstream). Pressure type vacuum breaker (must be installed 6 inches above highest head and valves are permitted downstream). Reduce pressure principle backflow preventer (must be located 12 inches above grade).