ON each push and pull stroke, air is drawn into the piston chambers through flapper valves in the ends of the box.

This allows the flapper valve to open and close with the air pressure.

Replacing a flapper valve with a new one is often just as easy.

These problems can be most easily corrected by replacing the existing tank ball with a flapper valve.

Two large flapper valves that open and close to control fuel flow are attached to these shafts.

Air feed to the engine was controlled by a flapper valve vent forward on the nose of the board's top surface.

She brought the sledge up to the overhanging lip of the flapper valve.

When you press down on the lever, this raises the rubber ball or flapper valve so that water rushes out the bottom.

Replacing it with a new flapper valve will solve this.

The ballcock inside the tank is adjusted properly and the flapper valve is working fine.