Container installation for liquids, epecially tank installation for motor vehicles

A container installation for liquids, especially a tank installation for motor vehicles, is proposed which has at least two laterally spaced liquid containers which, on the one hand, communicate with one another via an overflow line in the lower region and, on the other hand, are connected to one another via an aeration/deaeration line which is arranged at a distance from the upper walls of the container and has line sections which are located inside the liquid containers, lead upwards and terminate in the region of the upper container walls. One of the liquid containers is provided with a removable container seal which preferably ensures both aeration and deaeration. A float valve is assigned to each open end of the line sections leading upwards in the liquid containers, which float vlave seals the line section when a predetermined filling level has been reached or when there is a danger of liquid sloshing into the line section. The float valves therefore keep the deaeration lines free of liquid and ensure that the levels in the liquid containers are constantly equalised.