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Success story with Bavarian roots.

THORN Abwassertechnik was founded in 1974 by Manfred Thorn in Munich-Schwabing as a drainage service. Initially, three specialists were deployed to clean blocked sewers, pipes, WCs, washbasins and drains in and around Munich.

In the following years, our company grew steadily. In addition, it has always been important for us to build up specific expertise. For many years we have been working with TV inspections to record the actual state of wastewater systems. Renovation in a closed building structure is also one of our special fields. 

THORN Abwassertechnik becomes an international enterprise.

In 1998, THORN Abwassertechnik GmbH was integrated as a 100% subsidiary into PORR Umwelttechnik GmbH, Vienna/Austria. 

We can now look back on over 40 years of enduring success. As a full-service provider of maintenance, inspection and rehabilitation for drainage systems and special structures, we are your strong partner for all aspects of wastewater.