n advantages:
. Lightness for easy transport, storage and installation at the yard
. Watertightness of the whole system is guaranteed by stubs put onto the manhole inlet and outlet
. Manholes can be designed upon the project engineer request (i.e. L manholes, multiple inlet manholes)
. Installation of a sewer pipe system made of the same material.
Technical characteristics
Manholes drawn from pipes are available in two versions:
1. Flat bottom
2. Plain bottom