The flapperless flush valve is brought to you by Fluidmaster, the most reliable name in toilet care. The flapperless flush valve is the replacement fill valve and a unique part exclusive to the flapperless toilet. It installs in minutes for the perfect flush each and every time. Made from high-quality plastic that won't corrode over time. Preset fill rate delivers the correct amount of water to the toilet each time. Complies with UPC standards. Easy installation can be done in minutes without needing to remove the tank.