Deringer 40G Reduced Pressure Backflow Preventer with Gate Valves

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Deringer 40G Reduced Pressure Backflow Preventer with Gate Valves

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Deringer 40G Reduced Pressure Backflow Preventer with Gate Valves

How To Tell the Difference Between a Deringer 30 & 40

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How To Tell the Difference Between a Deringer 30 & 40

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DERINGER 40 RED PRESSURE ZONE ASSY