Photo 1 of ??? 1/2" 9D-M3 Dual Check Valve Backflow Preventer with Intermediate Atmospheric Vent, Brass backflow preventer Female Union Inlet and Outlet Connections, 190T012, Replacement for Watts

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Photo 1 of ??? 1/2" 9D-M3 Dual Check Valve Backflow Preventer with Intermediate Atmospheric Vent, Brass backflow preventer Female Union Inlet and Outlet Connections, 190T012, Replacement for WattsPhoto 2 of ??? 1/2" 9D-M3 Dual Check Valve Backflow Preventer with Intermediate Atmospheric Vent, Brass backflow preventer Female Union Inlet and Outlet Connections, 190T012, Replacement for Watts