A valve upper part for insertion into a sanitary fitting includes a head piece in which a spindle is pivotably mounted, the first end of the spindle projecting from the head piece and the second end thereof engaging via a pin with a control element which is in contact with a stationary passage disc, wherein the passage disc has at least two passage openings and wherein the control element is designed as an adjusting block which is dimensioned such that it can be used to seal at least one passage opening.