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Germany: Zweckverband Landeswasserversorgung (LW), Osterbuchstollen near Oberkochen


  • Installation of an energy-efficient and sustainable solution with new steel pipe drinking water line DN 1200
  • Modernization of the 1868 m long tunnel after more than 100 years of operation by Zweckverband Landeswasserversorgung
  • Heart of the 100 km pipeline from Langenau to Stuttgart
  • Drinking water supply for 1.5 million people
  • Fully enamelled valves for best drinking water quality and long service life

More Information concerning this project of Zweckverband Landeswasserversorgung.

Product list

  • ROCO Wave butterfly valves (DN 200 - 1200)
  • ERK non-return valve (DN 900)
  • INFINITY resilient seated gate valves (DN 100)


  • ERHARD GmbH & Co. KG
  • Meeboldstraße 22
  • 89522 Heidenheim, Germany