Abstract: A connector which has an inlet and an outlet, along with an additional by-pass portion. The by-pass portion is moveable between two configurations; a non by-pass configuration and a by-pass configuration, wherein when the by-pass portion is in the non by-pass configuration this allows liquid to pass through the inlet and exit the outlet; and when the by-pass portion is in the by-pass configuration there is a region of the internal surface of the connector which at least partially overlaps the by-pass portion so that liquid entering the inlet can be redirected along the by-pass portion and out the by-pass outlet to effectively prevent liquid from exiting the outlet.