An apparatus for processing containers includes a container-filling system having filling-point pairs in which each filling point has a filling element. Each filling element has a channel formed in a housing, a liquid valve in the channel that controls flow through a dispensing opening. The filling system also has internal and external gas-paths that are internal and external relative to the filling elements. These gas paths connect to each other. A gas-path control-valve controls the external path. Nothing controls the internal path. A stand-alone control module contains part of the external gas-path and the gas-path control-valve.