Designed to minimize costly water loss, the WaterWI$E Fill Valve is the only dual shut-off fill valve that detects flapper leaks and hang-ups. Saves water due to leaks by not refilling the tank during a slow flapper leak and automatically shuts off if flapper is stuck open. Designed to fit more toilets, this toilet fill valve adjusts to fit both large and compact toilet tanks. The WaterWI$E Fill Valve is quieter than other fill valves. Included in the kit is the Korky Plus 2 in. toilet tank flapper. The universal flapper is constructed from durable rubber and offers chlorine resistance. Easy to install, the 818Z includes: (1) 528Z Fill Valve, (1) 2001 Flapper, (1) Refill Tube, (1) Metal Refill Tube Clip, (1) Mounting Nut, (1) Cone Washer, (1) Coupling Nut, (1) Tamper Proof Key and (1) Instructions.