Removing tuberculation before UV-lining
Years of hydrogen sulfide gasses passing this pipe section in Ibaraki, Japan had taken it's toll. The Hume pipe was heavily tuberculated and the upstream manhole in a very bad shape.
Reason for Daito CO., LTD. to take this job and remove the tuberculation with water jet cutting. Afterwards, a manhole to manhole UV-liner was installed and the upstream manhole rehabilitated to solve the problem.