We have seen a lot of water pumps over the years, and most of them fall into distinct categories. Grundfos, however, now offers a pump that is in its own category. It is called the S-tube. The S-Tube is designed for wastewater processing, and combines the designs of a few different types of pump to … [Read more...] about Is the Grundfos S-tube the Wastewater Pump of the Future?