Geneva Pipe and Precast’s Liner Systems offer many solutions for concrete corrosion in manholes. The thermoplastic liners install a permanent barrier that isolates the concrete structure from the sanitary sewer effluent. Concrete protective liners are easy to install, safe to maintain, and are effective at preventing or repairing the corrosive effects of H2S gas. The maintenance-free advantage of liners make the total cost of ownership very low for the design life of the sewer collection system.