Apparatus and systems are disclosed for improved set-up of multi-ingredient compounders. An improved apparatus includes a manifold and a plurality of valve members disposed for movement relative to different corresponding ones of a plurality of inlet ports of the manifold. The valve members are moveable to open and close a corresponding fluid passageway between the corresponding inlet port and an internal passageway of the manifold. A plurality of caps are locatable on different corresponding ones of the inlet ports, with each of the caps being engageable with the corresponding valve member for co-movement from a locked position at which the cap is restricted from removal to an unlocked position at which the cap is removable, e.g. by manual, axial retraction of the cap. An improved system includes a compounder controller operable to control valve actuators of the compounder so as to sequentially move the valve members and corresponding caps from locked to unlocked positions in a predetermined sequence, thereby reducing the potential for undesired cross-connections.
