Adjustably sealed multi-line fluid coupler

A fluid line connector assembly, comprising:

• a first part defining a fluid channel;
• and
• a second part comprising an outer body and a backing piece member, the backing member being movable for adjusting movement relative to the outer body in a directional normal to an axis of engagement in response to relative motion of the first part and the second part when the first part and the second part are connected, the backing piece member defining a fluid channel within the body;
• wherein the first and second parts together define the axis of engagement along which the first and second parts are releasably connectable, the fluid channel of the first part being adapted to connect to the fluid channel of the second part, and, when the first and second parts are connected, the fluid channel of the second part remains in fluid flow connection with the fluid channel of the first part during adjusting movement of the backing piece member relative to the outer body of the second part.