Duke was Founded in 1925 by M.P. Duke, we were the first manufacturer of the waterless hot well. Today, Duke Manufacturing has over twenty product lines with over 4,500 SKUs. We operate two manufacturing plants in St. Louis and Sedalia, Missouri. Our state-of-the-art Sedalia plant is 680,000 square feet and ISO certified. Duke has global sales, service and distribution facilities in Europe, Latin America and Asia.