Built on market leading valve technology, it is as reliable as the Gulper 220 but with a 35% higher flow. Improved features in comparison with the 220 model:1)Patented Ezi-Clamp locking ring: head rotates 360° without loosing screws.2) 3-foot design for quick and easy installation.3)Anti-vibration rubber support belt.4) Hose adaptor for 19-mm and 25-mm Ø tube.