This European Standard specifies the design, dimensions, technical requirements and testing of connections for the discharge of oily mixture produced by inland navigation vessels. It is not applicable to the disposal of cargo residues from cargo tanks. This standard specifies: a connection of a design common on inland navigation vessels which consists of a threaded pipe and quick-release coupling; a connection for vessels with flange ISO 7608 A1, consisting of an adapter with matching flange and welded threaded pipe and quick-release coupling.