Additional unit for sink, particularly kitchen sink

The invention relates to an auxiliary unit for a sink (1), particularly for a kitchen sink, with at least one water inlet (5, 6) for cold and hot water (drinking water) (K, W), at least one output unit (3) for the cold and hot water (drinking water) (K, W), a basin (2) and an outlet (4). To ensure a particularly easy handling carbonized drinking water to ensure, the invention provides that in the sink (1) is a preparation and dispensing station (7) for carbonated water (C) are integrated.