Chamber valve check

Unscrew the dust cap from the valve.

Wet the valve with soapy water or saliva. If an air bubble forms, close the valve firmly with the dust cap turned upside down.

Attention: The valve can only be tightened with a metal cap. Such metal caps can be purchased at gas stations.

Check the valve again. If air bubbles still form and the valve is no longer tightened, it must be replaced.

Be sure to reattach the dust cap to the valve.