Valve Body Assembly for Fleck 5600 ( old # 14449 ), newer PN = 61400-12 Has 1" distributor opening ( true 1.05" ). Includes O-rings distributor 13304 and 12281 valve to top of tank,and nothing more.NOTE: Don't be confused by whether your Piping connections ( yoke or by pass ) are 3/4" NPT or 1" NPT ( NPT = National Pipe Thread ). There is only ONE Valve Body "size" and it Attaches to any Fleck yoke or by pass made for the Fleck 5600.All Downflow ( all mechanical and most SXT if green top piston ) applications work with this Valve Body.You will need to transfer your Injector Drain Module, Main Piston, Main Seals and Spacers, Brine Valve Piston, and Power Head to this new Valve Body. Note: The Valve Body accepts Twist On Upper Distributor MD1203 listed below. ALSO: If your old center distributor ( riser ) pipe is NOT 1.05" O.D. ( some per-1997 earlier models were 13/16" ), you will need to order the 13/16" bushing ( AP1001986 ) listed below, or replace your distributor tube with the new 1.05" O.D. size ( purchase the Bottom Distributor listed below, PN # MD1236 ).