Float Arm
Definition and meaning of Float Arm in real estate.
A float arm is a rigid metal or plastic rod in a gravity-fed toilet tank that connects the toilet's floating mechanism to the water intake valve. It rises and falls with the water level, controlling when the valve opens to fill the tank or closes to stop the flow of water.
In more detail
This mechanical component is essential to the everyday plumbing system of a home. When the toilet is flushed, water drains from the tank, causing the float ball to drop and pulling the float arm downward. This downward movement opens the fill valve, allowing fresh water to enter the tank.
As the tank fills, the rising water lifts the float, which raises the float arm until it eventually closes the fill valve at a preset level. If the arm is bent or out of adjustment, it can cause the toilet to run continuously or fail to fill completely.
Key facts
| Category | Property Types & Construction |
|---|---|
| Applies to | Gravity-fed residential toilet plumbing systems |
| Common materials | Brass wire, copper, or rigid plastic |
| Watch out for | Bending or corrosion, which can prevent the water valve from shutting off properly |
A homeowner adjusts a bent metal float arm in their toilet tank to ensure the float ball shuts off the water valve at the correct level, stopping the toilet from running.
Frequently asked questions
How do you adjust a toilet float arm?
If it is a metal arm, you can gently bend it downward to lower the water level or upward to raise it. Plastic arms typically have an adjustment screw near the valve.
Why is my toilet running constantly?
A common cause is a misaligned float arm that keeps the valve partially open, allowing water to continuously drain into the overflow tube.