| 摘要 |
This invention concerns an accessory for an exhaust ventilation pipe, which exhaust ventilation pipe comprises an exhaust pipe (1) of a ventilation channel, provided with a hat (2) and extending through an outer roof of a building, the upper part of the hat (2) being provided with a conical cup (3) preventing rain water from entering the ventilation channel. The invention is characterized in that a circular sprite level (6) is integrated on the top of the conical cup (3) in the hat (2). |
