Profile: Assmann Corp. Of America manufactures polyethylene storage tanks. Our product line includes conical bottom tanks, custom molded, double wall, large double wall and horizontal storage tanks. We also produce tank accessories, which include U-vent assemblies, flange fittings, bulkhead fitting, tie-down assemblies, sight gauge assemblies and double wall tank accessories. Our double wall tank accessories include reverse float level indicator, fiberglass reinforced ladder assemblies and ultrasonic level indicating device. Our reverse float level indicator is designed to show liquid level in the tank without having chemical outside the secondary containment.