| 摘要 |
<p>A filter funnel for a drainpipe (3, 4) comprises a funnel (9) which, with an outlet portion (1), is connected to the lower portion (3) of the drainpipe, while its upper portion (4) discharges in or above the funnel (9). The funnel (9) has an obliquely inclined grid (10) which is accessible via a portion (8) of the funnel (9) extending laterally outside the drainpipe. The outlet portion (1) is provided, beneath the grid (10), with a shut-off valve (11, 12) and there is disposed above this an outlet opening (13) for rainwater. Suitably, the outlet opening (13) also has a shut-off valve (15, 16) which is connected via an arm (14) to the valve (11, 12) of the outlet portion (1) so that the one valve is closed when the other is open, and vice versa.</p> |
