Pump, pump system and water-conducting household appliance

The invention relates to a pump (1) for a water-conducting household appliance (100), comprising: a shaft (2) extending in an axial direction (A); a bearing bush (3) configured for rotatably supporting the shaft (2) about the axial direction (A); a drive device (4) configured to drive the shaft (2) in rotation; the bearing bush (3) has a sealing element (5) which is designed to seal against the shaft (2), the sealing element (5) being arranged in a sealing region (6) of the shaft (2) and the drive device (4) being arranged in a drive region (7) of the shaft (2) opposite the bearing bush (3), and wherein the bearing bush (3) has at least one passage (8) through which the bearing bush (3) is inserted into the sealing region (6) of the shaft (2). The through portion is configured to communicate the sealing area (6) with the driving area (7). The invention further relates to a pump system and to a water-conducting household appliance. 本发明提供一种用于引导水的家用器具(100)的泵(1)，其包括：轴(2)，其沿轴向方向(A)延伸；轴承衬套(3)，其构型成用于使所述轴(2)能围绕所述轴向方向