Sudhaus gravity locks and bio-filter lids - a perfect match. Many municipal companies ask us whether the Sudhaus gravity locks and bio-filter lids work well together. They do, and they complement each other perfectly. The gravity lock not only protects your own bin from being filled by others, but also prevents third parties from introducing contaminants, especially in the organic waste bin. Yesterday visited BIOLOGIC CSO Sven Betting Sudhaus in Iserlohn together with Andreas Knappheide (photo right). Thanks to Thomas Blume (Key Account Manager / photo left) and authorised signatory Ralf Grohn for the friendly reception on site.