Drain and inspection manhole for liquid conduits and manhole...

Details Drain and inspection manhole for liquid conduits and manhole... Drain and inspection manhole for liquid conduits and manhole...

E - Fixed Constructions

03

F

E03F 5/02 (2006.01) E02D 29/12 (2006.01) F16L 25/00 (2006.01) F16L 41/08 (2006.01)

Patent

CA 2251529

A drain and inspection manhole for liquid conduits, in particular waste water and/or storm water drains, comprises a manhole section which is formed as a composite pipe having a smooth cylindrical internal pipe and a corrugated external pipe. The external pipe is deformed to comprise at least one connecting base with a marginal web. Apertures that are flush with each other are cut into the connecting base and the internal pipe, a connec- tor being inserted in these apertures.

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