Fuel Tank Check Valve

Fig 1: View Of Fuel Filler Pipe & Check Valve

Courtesy of GENERAL MOTORS CORP.

The fuel filler pipe (1) of the fuel tank is equipped with an inlet check valve (2). This fuel tank check valve (2) prevents the fuel from spewing into the fuel filler neck during vehicle refueling. The fuel tank, pipes, and hoses should be checked for any road damage which may result in leakage.