Piston and Seals Assembly Kit for all Touch Screen Valves for whole home filtration and pre-sed systems. 6-7/8" with a yellow dot to designate the proper piston with inside diameter that has a threaded bottom (vs ribbed)
Piston (donwflow) and Seals Kit for all Touch Screen Valves for iron systems. 7-1/8" with a white dot to designate the proper piston with inside diameter that has a short ribs (vs long ribs or threaded)
Piston (upflow) and Seals Kit for all Touch Screen Valves for upflow brining softeners. 7-5/16" with a blue dot to designate the proper piston with inside diameter that has 4 long ribs at the bottom (vs short ribs or threaded)