Device for preventing external water from entering sewerage, pumping stations and clarification plants has openings in shaft/channel covers which are covered in an air-permeable but water-impermeable manner by membranes/microporous coatings

摘要

Device for preventing external water from entering sewerage, pumping stations and clarification plants has openings in shaft/channel covers which are covered in an air-permeable but water-impermeable manner by individually separated membranes/microporous coatings (4) or a closed ring of a membrane/microporous coating. Preferred Features: Inorganic and climate membranes are used as the materials for the membranes/microporous coatings. Form-locking inserts (3) with attached outer and inner support surfaces are inserted in the openings in the shaft covers. The inserts have spring hooks.