Inspection.
Unforeseen repair costs in the sewer system are every sewer manager's nightmare. Where exactly are the defects located? How and when is the best time to replace the infrastructure?
Will local interventions still help, or are you facing a replacement investment? These questions arise when problems arise.
The good news, however, is that preventative maintenance of 20% of a sewer system's pipe infrastructure already avoids 80% of the risks. Therefore, systematic management offers enormous cost savings.