CMP 25830-704-800 - Check Valve Flapper AssemblyCMP 25830 704 800 Check Valve Flapper Assembly is a replacement flapper assembly for CMP HydroSeal standard serviceable check valves in 1 1 2 inch and 2 inch sizes. It includes the flapper, cover, and O ring to restore proper one way water flow and help stop backflow through the valve body during normal system operation. Key Features: 1 1 2 and 2 inch fit Flapper cover and O ring HydroSeal valve replacement Backflow control repair