Get the toilet that fits your needs. Sterling has added new engineering and additional bowl heights to its high-efficiency toilet line. The models enhanced include the Karsten and Rockton Dual Force (pictured), and Stinson, Windham and Riverton Pro Force. The newly configured bowls in Sterling’s Pro Force flushing technology line have the ability to hold both a 1.6- and a 1.28-gpf tank, categorizing the 1.28 versions of these toilets as high-efficiency. To expand the height offering in both its Dual Force and Pro Force lines, they are available in Luxury Height, which have a higher bowl than standard toilets, making sitting and standing easier.