Industrial Goods and Services Fluid and Gas Control Tanks PlasticAssmann Manufactures Polyethylene / Plastic Storage Tanks and Containers with up to 12,000 Gallon Capacities in One-Piece Construction The Way We Process Makes the Difference Assmann Corporation manufactures large polyethylene storage tanks and containers with up to 12,000 gallon capacities. We begin by selecting virgin resins with no re-grind for each application and manufacturing in one-piece construction via rotational molding. Our extensive processing experience and commitment to quality construction provides a superior plast