Abstract: A method and apparatus for the preparation of solutions to be manufactured from at least two concentrates and a solvent. First and second concentrate holders are connected to a solvent source by respective feed lines and to a collection holder by respective discharge lines. The solvent source is connected to the first concentrate holder when a connector is in a first position and to the second concentrate holder when the connector is in a second position. Solvent flows through the first concentrate holder and the solution is led into the collection holder and, after the flushing of the concentrate from the first concentrate holder, the second concentrate holder is automatically connected through movement of the connector from the first to the second position, whereupon solvent flows through the second concentrate holder and the solution is likewise supplied to the collection holder.