A beverage dispense system comprising: a beverage line (2, 2') for transporting beverage from a beverage supply to a dispensing site, the beverage line having a distal end (3, 3'); a bubble detection system comprising: a connector (18, 18') affixed to the distal end (3, 3') of the beverage line (2, 2') and having a sensor for sensing bubbles within the beverage line (2, 2') and for generating a signal for closing the beverage line (2, 2') when a predetermined level of bubbles is detected, the connector (18, 18') comprising a connector cooling circuit comprising a connector cooling line and a connector cooling return line for carrying chilled cooling medium, the cooling lines being in heat exchange relationship with the beverage line (2, 2') within the connector for cooling the beverage line within the connector, and a valve operable to close the beverage line (2, 2') upon receipt of a signal from the sensor, the connector being connectable to the beverage supply (4, 4'); and a cooler for cooling beverage, the beverage line (2, 2') comprising a first beverage line portion (7, 7') extending from the distal end (3, 3') to the cooler within a first insulated carrier, wherein the first insulated carrier comprises a first cooling line for transporting chilled cooling medium through the first insulated carrier so as to allow heat exchange between the cooling medium in the first cooling line and the beverage in the first beverage line portion (7, 7'). a beverage line (2, 2') for transporting beverage from a beverage supply to a dispensing site, the beverage line having a distal end (3, 3'); a bubble detection system comprising: a connector (18, 18') affixed to the distal end (3, 3') of the beverage line (2, 2') and having a sensor for sensing bubbles within the beverage line (2, 2') and for generating a signal for closing the beverage line (2, 2') when a predetermined level of bubbles is detected, the connector (18, 18') comprising a connector cooling circuit comprising a connector cooling line and a connector cooling return line for carrying chilled cooling medium, the cooling lines being in heat exchange relationship with the beverage line (2, 2') within the connector for cooling the beverage line within the connector, and a valve operable to close the beverage line (2, 2') upon receipt of a signal from the sensor, the connector being connectable to the beverage supply (4, 4'); and a connector (18, 18') affixed to the distal end (3, 3') of the beverage line (2, 2') and having a sensor for sensing bubbles within the beverage line (2, 2') and for generating a signal for closing the beverage line (2, 2') when a predetermined level of bubbles is detected, the connector (18, 18') comprising a connector cooling circuit comprising a connector cooling line and a connector cooling return line for carrying chilled cooling medium, the cooling lines being in heat exchange relationship with the beverage line (2, 2') within the connector for cooling the beverage line within the connector, and a valve operable to close the beverage line (2, 2') upon receipt of a signal from the sensor, the connector being connectable to the beverage supply (4, 4'); a cooler for cooling beverage, the beverage line (2, 2') comprising a first beverage line portion (7, 7') extending from the distal end (3, 3') to the cooler within a first insulated carrier, wherein the first insulated carrier comprises a first cooling line for transporting chilled cooling medium through the first insulated carrier so as to allow heat exchange between the cooling medium in the first cooling line and the beverage in the first beverage line portion (7, 7').