Motor vehicle tank with air venting

A fuel tank with an air removal system, the air removal system comprising:

• an air removal line connecting an interior space of the tank with an ambient environment, the removal line forming a siphon at a deepest location of the air removal line and defining a separation through the siphon;
• a connection piece having four ports, a first and a second of the ports attached to and inserted within the air removal line at the separation, the connection piece defining a fuel accumulation chamber between the first and second ports, a suction chamber between a third and a fourth of the ports, and a suction opening between the fuel accumulation chamber and the suction chamber;
• a one-way valve mounted at the suction opening in a closed position and movable to an open position;
• and
• a suction source within the suction chamber, the suction source created by flow of fuel from the fuel tank into the third port, through the suction chamber and out the fourth port to thereby apply suction to the air removal line from the suction chamber via moving the one-way valve to the open position, thereby opening the suction opening and removing fuel from the fuel accumulation chamber via the suction opening, the suction chamber, and the fourth port.