The venting system is used when a storage tank is filled without vapour recovery (vapour displacement method). This assembly ensures that the high volume flows do not lead to overpressure when filling a tank. The air to be vented can be easily discharged into the environment or selectively. In this way, no overpressure is created in the tank. Of course, in combination with a GIEBEL Adsorber the inflowing supply air is dried in the tank and the substance is protected from contamination with water.