A condensate separator is provided for a coaxial tube system, which has an inner gas duct (3) and an outer gas duct (4). A first liquid duct (10) is arranged between the inner gas duct and a first collection volume (8) and a second liquid duct (11) is located between the outer gas duct (4) and a second collection volume (9). The collection volumes (8, 9) are located with a partition (7) in between in a liquid collecting container (6).