Graco's SoloTech Hose pump design utilizes a single roller that compresses an engineered hose through a full 360 degrees of rotation. This innovative design means longer hose life when pumping caustic, abrasive, or sensitive materials for metering or transfer. Gas entrapped fluids are also easily pumped or dosed into your application. And without valves, seals or glands, the Solotech hose pumps are easy and less costly to maintain.