Abstract: The invention relates to a control fitting having a two-way cross-fitting, which has an inlet connecting piece, an outlet connecting piece and a passage connecting piece, and having a control element which is arranged in a guide connecting piece of the control fitting so as to be movable between an open position and a closed position, wherein the outlet connecting piece, in the open position of the control element, communicates with the inlet connecting piece and, in the closed position of the control element, is blocked relative to the inlet connecting piece and the passage connecting piece communicates with the inlet connecting piece both in the open position and in the closed position of the control element, and wherein the guide connecting piece has, on an end remote from the outlet connecting piece, an opening for receiving the control element.