The S-tube impeller has no edges, dead zones, or cutting functions that can get worn over time. It features a patented labyrinth and sealing system, which can help prolong operation and has improved non-clogging capabilities and free passage.
Grundfos' impeller consists of a tube-shaped impeller in a pump housing that matches the tube shape through the entire pump. The simplicity of the S-tube impeller eliminates the need for advanced and costly add-on assemblies that in a static or dynamic way are designed to cut, shred or treat the wastewater as it flows through the pump. The impeller is balanced so that there is less vibration and noise. The smooth design through the hydraulics ensures less abrasive wear and improves the non-clogging capabilities.