The invention relates to a removable unit (1) for an apparatus (2) for connecting and disconnecting a tubular fitting (24) to a connector (14) comprising: a body (16) having: a first port (18) and a second port (20) each said ports configured for receiving an end cap (22) of the tubular fitting (24) and a connector holder (26) being disposed between said first and second ports (18 20) and configured for accommodating insertion of the connector (14); wherein said body (16) is configured to be connected to said apparatus (2) in a releasable fashion.