Profile: Downstream Environmental Engineering Ltd. manufactures automated fuel systems and bulk fuel storage tanks. Our fuel pumps share a common inlet and outlet valve block, but they are independent of each other. Petro link tank gauging is developed to enhance environmental protection solutions. All installations are designed to withstand the rigors of the oil industry. Enclosures are heavy duty steel with large displays to allow depot staff along with tanker drivers to access data and control systems, without the need to fiddle with tiny keypads & toggle switches.