Penetration-secured metal light manhole cover, has light-transparent part and metal fields provided with mushroom-like ventilation plug, where plug is inserted into fields, and taphole and tubular-like handle receiving ventilation recesses

摘要

The cover (1e) has a light-transparent part and metal fields provided with a mushroom-like ventilation plug (1a), where the plug is inserted into the fields, rests on a diagonally outward sloping plastic disk (1b) and screwed on the fields. A lower part of the taphole is provided with a ventilation infill. The taphole is connected with a tubing-like handle that is provided with louvers that takes up insertable, fine-meshed filter pipe (1c). A screw strengthens the handle at the cover, and the insertable filter pipe is locked. The taphole and tubular-like handle receive ventilation recesses.