Instead of the dominant hydro-mechanical cleaning (using high-pressure water jets), we apply mechanical cleaning to allow for removal and preventative maintenance of the drainage pipes. This allows us to completely remove the consumption of water from the process. In addition, instead of using fossil fuel for operating the machinery, DrainBot relies on electricity sourced from a redundant battery system included in the body of the robot. By providing the operator with an autonomous charging system, we ensure almost permanent operation ultimately enabling preventative and predictive maintenance of the tunnel drainage.