Sloan CN1002A Closet Piston Repair Kit with Seat

Toilet flush-valve piston repair parts replace piston-type assemblies within a flush valve (flushometer) to restore proper flushing and sealing. The piston assembly regulates pressure inside the flushometer using a cylinder with a sliding cup seal that seals the valve seat after each flush. Signs that the piston assembly may need replacement or repair include a toilet that won't flush, keeps running, or has a flush that's too short or too long.