OTS (Off the Shelf) is a program operated by The Gorman-Rupp Company that offers a complete line of small pumps, including self-priming, straight centrifugal, diaphragm, submersible, mag drive, peristaltic, bellows, gear and piston models. Drive options include engines, electric motors or basic pedestal configurations. OTS include products from AMT, IPT, Gorman-Rupp Industries and The Gorman-Rupp Mansfield Division.