Profile: TolPlast Company Inc. manufactures molded plastic tanks, fabricated plastic tanks, FRP tanks, steel tanks, plastic storm water pipe, HDPE corrugated pipe fittings, plastic liners, erosion control products, custom plastic fabrication, trench drains, and meter valve boxes. We offer a complete line of polyethylene double wall tanks or dual containment tanks. Our poly double wall tanks come with a variety of options including OSHA approved ladders, seismic restraint systems, leak detection systems, level indicators, heat tracing, and tank insulation. Our FRP tanks are provided in sizes ranging from 25 to 30,000 gallon capacities. We provide a full compliment of FRP tanks including horizontal fiberglass tanks, vertical fiberglass tanks, cone bottom fiberglass tanks, and open top fiberglass tanks.