Fill Valve:
The hardware inside the toilet tank that controls how much water fills the tank. Can be a ballcock or float cup style. Most new versions of fill valves are available with water-saving features.
Flapper:
Rubbery plug/seal attached to the lift chain at the bottom of your toilet water tank (also called stopper, tank-ball, seal or disk).
Float ball:
The ball that rides on the surface of the water in the tank. When the tank is full, the float ball shuts off the ballcock.
Float Cup Fill Valve:
The float cup fill valve is made of plastic and is a more “modern” style anti-siphon fill valve. Water flow is controlled by a plastic floating O-shaped cup that moves up and down concentrically about the fill valve shaft that raises the float arm, shutting off the valve.
Floatless Type Ballcock:
The floatless ballcock is made of plastic and is a newer innovation in anti-siphon fill valves. These units use a diaphragm pressure sensing mechanism as opposed to any type of float mechanism to adjust water level in the toilet tank.
Floor Flange:
Is a pipe fitting that both mounts a toilet to the floor and connects the toilet drain to a drain pipe. The flange is a round steel mounting ring that sits on top of the pipe fitting. The toilet is bolted onto the flange (also called Closet Flange or Toilet Flange).
Floor Register:
A register is a grill with moving parts, capable of being opened and closed and the air flow directed, which is part of a building's heating, ventilation, and air conditioning (HVAC) system. Floor registers are used on the floor, as opposed to wall registers.
Flush Lever:
Located on either the left or right hand side of the toilet tank; it activates the trip lever arm to initiate the flushing cycle in order to flush out the contents of the toilet (also called toilet handle or trip lever handle).





