Sewer cleaning, sewer inspection; If necessary, deformation measurements, leak tests, inclination measurements, fogging and removal of obstacles in the sewer.

The subject of the tender is the performance of sewer cleaning and sewer inspection work in the Ettlingen sewer network, which currently consists of approx. 270 km of pipes and the associated connecting pipes. The wastewater is discharged via mixed water systems, modified mixed water systems and separation systems. With a few exceptions, the Ettlinger sewers have a diameter between DN 100 and DN 2000. Mostly circular profiles exist.

According to the ordinance of the Ministry of the Environment on the self-control of sewage systems (EKVO), a sub-network of approx. 25-30 km in length is examined annually.