Home / Backflow Assemblies / Ames Backflow Assemblies / 4 IN / RPDAFilter your Results Assembly TypeAll C500 RPDAFind PartsClear FiltersSKU: A C500OSY4AMES 4" C500 RPDA BACKFLOW ASSEMBLY W/ OS&Y GATE VALVES, BYPASS ASSEMBLY, CF METER, AND FLOOD SENSOR (NOT LEAD FREE)$7,421.11Add to CartSign In for Contractor Price