Method for displacing a fluid in a system according to claim 8, from a supply container to a buffer tank, for use in industrial laundry, comprising the steps of: A) providing a supply container provided with a fluid and a buffer tank, configured to receive fluid supplied by a supply container, wherein said buffer tank is connected to an industrial textile washing device or forms part of the industrial textile washing device; and identifying the supply container and/or the buffer tank, wherein the identification of the supply container and the buffer tank according to step A) takes place by scanning a tag (5, 6) connected to respectively the supply container and the buffer tank, which tag (5, 6) comprises information related to the fluid; B) selecting at least one coupling component for coupling the supply container to the buffer tank, which coupling component is configured to be successively coupled, directly or indirectly, to a plurality of buffer tanks and a plurality of supply containers, which coupling component is provided with at least one identification means, wherein the at least one identification means comprises a programmable identification element, in which information identified during step A) is stored; C) coupling the supply container to the buffer tank via the at least one coupling component, D) verifying, on the basis of the programmed identification element of the identification means of the at least one coupling element, the coupling of the at least one coupling component and at least one adjacent identified component realized during step C), which at least one adjacent component is formed by at least one component chosen from a group consisting of: the supply container, the buffer tank and at least one other identified coupling component, wherein this verification makes use of a control unit and at least one database coupled to the control unit, wherein said at least one database is provided with a plurality of programmed cross-references, wherein each programmed cross-reference is formed by an identification of a coupling component and at least one value which is dependent on the identification of the supply container and/or the buffer tank, and wherein at least one control unit is connected to the database for the purpose of verifying, on the basis of the identified coupling component and the cross-reference from the database related thereto, whether the fluid coming from the supply container may flow through the identified coupling component, and E) displacing fluid from the supply container via the at least one coupling component to the buffer tank if the verification during step D) is successful. A) providing a supply container provided with a fluid and a buffer tank, configured to receive fluid supplied by a supply container, wherein said buffer tank is connected to an industrial textile washing device or forms part of the industrial textile washing device; and identifying the supply container and/or the buffer tank, wherein the identification of the supply container and the buffer tank according to step A) takes place by scanning a tag (5, 6) connected to respectively the supply container and the buffer tank, which tag (5, 6) comprises information related to the fluid; B) selecting at least one coupling component for coupling the supply container to the buffer tank, which coupling component is configured to be successively coupled, directly or indirectly, to a plurality of buffer tanks and a plurality of supply containers, which coupling component is provided with at least one identification means, wherein the at least one identification means comprises a programmable identification element, in which information identified during step A) is stored; C) coupling the supply container to the buffer tank via the at least one coupling component, D) verifying, on the basis of the programmed identification element of the identification means of the at least one coupling element, the coupling of the at least one coupling component and at least one adjacent identified component realized during step C), which at least one adjacent component is formed by at least one component chosen from a group consisting of: the supply container, the buffer tank and at least one other identified coupling component, wherein this verification makes use of a control unit and at least one database coupled to the control unit, wherein said at least one database is provided with a plurality of programmed cross-references, wherein each programmed cross-reference is formed by an identification of a coupling component and at least one value which is dependent on the identification of the supply container and/or the buffer tank, and wherein at least one control unit is connected to the database for the purpose of verifying, on the basis of the identified coupling component and the cross-reference from the database related thereto, whether the fluid coming from the supply container may flow through the identified coupling component, and E) displacing fluid from the supply container via the at least one coupling component to the buffer tank if the verification during step D) is successful.