| 摘要 |
The pump (1) is located in a sump pump and fastened by a holder (4) to an elbow pipe (7). The holder has an upward extending ventilation pipe (9), which has a back pressure element (10,12) to prevent entry of fluid from the pump sump into the pump. The holder also has an upward facing bore containing a floating conical closure part (10), which acts sealing with a seat formed by a constriction in the bore. A pipe connected to the bore merges into an elbow (11) with downward direction opening closed by a floating closure part (12). This is formed by a flap, fastened moveable to the elbow. |
