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2-1/2" Backflow Preventor Valve Double Check Detector N Pat Grooved Butterfly Valve Fire Protection -
3" Double Check Detector Backflow Preventor Valve Grooved Assembly by N Pat -
4" Double Check Assembly with OSY Valve by Ames -
2-1/2" Double Check Assembly Backflow Preventor Valve GXG OSY Valve Fire Protection -
4" Double Check Detector and Pat Grooved Butterfly Valve -
2-1/2" Double Check Assembly With OSY Valve For Fire Protection -
3" Double Check Assembly Backflow Preventor Valve Ductile Iron -
6" Double Check Assembly With FxG OSY by Ames Valve -
10" Double Check Backflow Preventer Valve with OS&Y Bypass by Ductile Iron -
3" Double Check Backflow Preventor Valve with OSY Fire Protection System by ASTM -
2-1/2" Double Check Assembly With OSY Valve -
12" Reduced Pressure N Pattern Valve With OSY LF