Abstract: The invention relates to a kitchen mixing unit (1) which has an inlet for hot water (5) an inlet for cold water (6) and a mixer connection (9) for carbon dioxide, whereby CO2 can be added to drinking water in order to produce soda, to which syrups can also be added and wherein a filter and a cooling device can also both be connected upstream of the water inlet.

Abstract: The method provides for introducing gas, preferably CO2, into a liquid by means of a mixer. The arrangement includes a mixer (2), which is comprised of several mixing elements. Gas and liquid are mixed by the mixing elements. The individual mixing elements may have different sizes depending on the task at hand.

Abstract: A mixing assembly includes a water tap connection with at least one cold water feed which is provided with a second cold water feed that is connected to a CO2 supply. The CO2 supply is connected by a CO2 conduit to a metering station which is connected to the second cold water feed and is configured as a nozzle projecting in the second cold water feed and arranged radially to the second cold water feed. Provided between the metering station and the water tap connection is a mixer in the form of a static mixer. The second cold water feed is connected to the main water line, but can also be connected to the cold water feed by a branch pipe. Suitably, the second cold water feed is configured between the metering station and the water tap connection as a reaction conduit of e.g. helical shape.