The assembly has a vacuum adjusting device (1) whose connection unit (3) is connected by simple fitment with a pipe of a vacuum network, a connection unit (11) of a safety bottle (10) or a connection unit (21) of a filter (20). The connection unit of the filter is connected by simple fitment to another connection unit (12) of the safety bottle. Another connection unit (22) of the filter is connected by simple fitment to the former connection unit of the safety bottle or the pipe. The latter connection unit of the safety bottle is connected by simple fitment to the pipe.
