The GEROblanco^® sewer pipe system is a fully weldable pipe system. It is so flexible that deformations can be absorbed by the system without causing cracks and thus leaks. Electrofusion welding guarantees a permanently tight and longitudinally and transversely force-locked connection of the pipes to each other. This eliminates the risk of root ingrowth and infiltration or exfiltration. The low roughness of the surface of GEROblanco^® pipes also supports the operational safety of the pipe. A bright inner surface guarantees high inspection friendliness for camera inspection.