Gravity-tank flappers and seals cover the outlet where water leaves the tank to fill the bowl of a gravity-flush toilet. The flappers lift up to release water for flushing and reseat after flushing to hold water within the tank. The seals are rings that form a seal around the flappers. These parts are used to replace worn or warped flappers and seals that no longer seal properly and allow toilets to run continuously.,Gravity-tank repair parts help fix leaks and restore proper flushing on gravity-flush toilets to avoid the expense of replacing the entire toilet. These toilet tank parts are used to replace broken or worn parts on gravity-fed tanks commonly found in homes, multifamily residences, hotel rooms, and other low-traffic settings (20 to 30 flushes per day). Signs that a toilet tank needs repair include leaking, constant running, and failure to flush.