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Sewer rehabilitation

Better disposed of waste water.

Sewers are often only paid attention when they are defective. PORR subsidiary THORN Abwassertechnik GmbH provides a remedy and offers from the detection via the renovation through to leak testing and acceptance a complete range of services in the field of waste water, sewage system and building drainage from a single source.

We have more than 40 years of experience in waste water technology and use modern technology to the respective local and legal requirements. This includes, inter-alia, full filling, channel robotics, tube  lining, shaft / separator renovation or the installation of pipelines.

Combined sewer remote viewing system with high-pressure flushing and leak test unit for carrying out cleaning, inspection and leak testing of mains and manifolds up to DN 800.


Vehicle for the renovation of mains and manifolds from DN 50 up to DN 800.


Combined suction and flushing vehicle to carry out maintenance work on shafts and special constructions and flushing of the main and manifold pipes to DN 1000.