Function : A float valve has one purpose--to stop the flow of water in an inlet supply line. This is done with a float device that rises with the water level in the reserve tank and will cause the valve to be activated.

Features : A float valve has three primary parts. The valve, a stem and a float device. The valve is attached to the float device by the stem. This will regulate when the valve is opened and closed.

Operation : When the water in the reserve drops, the float device drops as well. This opens the valve and water begins to re-fill the tank. As the water rises so does the float device, which will eventually shut off the valve when it reaches the proper height.

Reliablity : The simplicity of the design allows the float valve to operate very efficiently and accurately over a long period of time. While the design has been modified, the original concept and function remains very much the same.