With a production capacity of over 200 tons per day, our Sanitary Manhole Department can assure on-time delivery of your products. Each 48” ID manhole section is individually vacuum tested at our plant to ensure performance on the job. Preformed butyl resin gasket for fast, watertight assembly is standard with our manholes. Monolithic bottoms, preformed inverts, enclosed lifting inserts and a variety of flexible manhole-to-pipe couplings provide you with a quick, economical high quality installation. For corrosive environments, interior or exterior coatings or linings are available. Permatile manufactures a variety of precast concrete drainage structures to meet your project requirements. Structures include catch basins, curb inlets, area drains, drop inlets, junction boxes, energy dissipators, spring boxes, BMPs, end treatments and knock-out boxes. These structures can be manufactured with watertight gasketed pipe-to-structure connections. Permatile provides castings, hatches, steps and other fittings to suit your contract needs.