Manhole rehabilitation is an essential weapon against infiltration of clear water to sewer systems. Manufacturers have developed a wide range of approaches to sealing or replacing the manhole chimney and rehabilitating the entire structure.Numerous materials — grouts, mortars and sealants — can be used to rehabilitate manholes. The manufacturers listed here provide not just materials but systems for manhole repair. They range from devices for applying sealants to tools for replacing structural components. Clearly, municipal managers have a host of technology options at their disposal when planning manhole rehabilitation initiatives.Cementitious application plantThe CG-550 Workhorse series of grout plants from Perma-Liner
