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 trip levers are replacement components for the handles used to trigger flushing of gravity-flush toilets. They're used to replace levers that have loosened, are sagging, or no longer activate flushing.

Gravity-tank fill valves allow water to refill the bowl and tank of a gravity-flush toilet after flushing. These inlet valves connect to the plumbing supply line and the tank's float rod. They open when activated by the float rod to allow water in and close when the tank is filled. They're used as replacements for valves that are damaged, clogged, or won't stop the toilet from running.

Gravity tank-to-bowl gaskets, hardware, and kits are components for installing new toilets or replacing worn parts on existing fixtures. Gaskets are rubber or plastic rings that form a water-tight seal at the tank-to-bowl connection. They deteriorate over time and may need replacement when they leak. Hardware components are nuts, bolts, and washers for connecting the tank to the bowl. They typically need to be replaced when they crack, corrode, or won't seat properly due to stripped threads.

Gravity-tank flush valves initiate flushing by lifting the flapper to release water from the tank into the bowl. These valve assemblies also allow water to pass through their overflow tube to refill the bowl. They're used as replacements for valves that no longer activate flushing.

Gravity-tank covers and locking devices fit atop the tank of a gravity-flush toilet to protect the flushing mechanism from debris and damage. The covers conceal interior components to provide a finished look. The locking devices secure a cover to the toilet tank to prevent tampering in restrooms where there's an increased risk of vandalism.