In accordance with standard NF EN 476, a manhole, DN >/= 1000 is used for cleaning and inspection, accessible to personnel.
The VISIMOP Monobloc 5480, diameter 1000 with 3 inlets – 1 outlet, in polyethylene, is a manhole with steps. It is designed for free-flowing PVC networks in diameters 200, 250, 315 and 400, with the option of drilling inlets in diameters 125, 160, 200, 250, 315 and 400.
This one-piece manhole is marked NF a, and the CSTB certifies that the manholes comply with the characteristics described in the NF442 certification standard.