| 摘要 |
<p>Draining tank comprising a sludge space, where there are connections (4, 5) for downpipes and other feed lines and discharge pipes for surface water. Above these connections the tank tapers off via a shoulder portion (8) to a seat (7) of a floatable ball arranged in the tank (6), which will abut against the seat when the water is rising and will seal the connection upwardly so that the water from the tank cannot penetrate into the connection (3) of the drainage water, which connection (3) is arranged together with a vertical connection for cleaning sludge removal.</p> |
