PLASTIC DRAIN OR INSPECTION CHAMBER PORTION WITH HOLLOW-WALLED CIRCUMFERENTIAL WALL, AS WELL AS MOULD ASSEMBLY FOR THEREOF.

摘要

The invention -relates to a drain or a portion of an inspection chamber, and a mould assembly for manufacturing thereof. The drain or the inspection chamber portion comprises a plastic circumferential wall, which circumferential wall, in the case of the drain, is preferably provided with openings for connection of the drain to one or more pipes. The drain or the inspection chamber portion can be manufactured by rotation moulding. The circumferential wall comprises a hollow-walled section provided with an internal wall and an external wall, wherein the internal wall and the external wall are locally abutted against each other for formation of reinforcements. These reinforcements are arranged such that they jointly span the entire hollow-walled section, seen in circumferential direction, yet without forming therewith one continuous abutment between the internal wall and the external wall.