Liquid tank with a connection element

The tank (100) has connectors (103, 109) extending along inner walls (105, 111) of liquid tank shells (101, 107) and connected with inner side of the tank. The tank shells are arranged with a plastic mold part. An injection molded part is formed between each of the tank shells and each of the connectors. A liaison vehicle is provided in contact surfaces (113, 115) of the connectors. A circular recess is formed on the contact surfaces of the connectors. Stabilization ribs stabilize one of the connectors at the inner wall of one of the liquid tank shells.