If you want to supply beer then you would need multiple units and also you should be able to use all the containers without replacing empty units. It is possible, if you use a multi keg changer. It is a changeover system that would tap the kegs one by...

Serving beer from kegs could be difficult, if you aren’t using a supply system designed for serving draft beer. The system includes connecting multiple kegs to a supply line and operating each keg with a changeover. The changeover is also called ecochange...