Jinan dredges sewers, dredges vegetable pools, washbasins, maintenance and installation, sewer reconstruction ☆☆☆☆ Change to separate sewers, maintenance and installation, sewer pipe cleaning, fecal drainage, toilet flushing, washing machine water change * * *. Jinan specializes in the maintenance of tap water pipe valves, installation and maintenance of upper and lower water pipes, installation of water pipe valves,