In 1972 Karl Grumbach handed over the entire management to his son Emil Grumbach. Emil Grumbach joined the company as an apprentice in 1947 and took over the technical management of the company in 1954. Emil Grumbach kept working on new problem solutions for practice. In the course of his life he was able to register a total of more than 30 utility models and 13 patents. The most important developments by Emil Grumbach include

  • 1950: Folding bench for hand and foot operation by one person (Today in use almost everywhere.)
  • 1960: Electrical screw stock for thread cutting (This solution is also in wide-spread use by installers.)
  • 1960: Prefabricated Pre-Wall Installations
  • 1961: Adjustable screw fitting for installation elements
  • 1961: Visible and concealed cisterns
  • 1964: Coverings for installations
  • 1965: Development of installation or room units
  • 1966: Development of outflows for showers, roof and balcony
  • 1968: Development of floor-level shower trays (belong today to the standard range of any shower tray manufacturer)
  • 1972: Development of sanitary cubicles, prefabricated bathrooms and prefabricated showers
  • 1981: Pipe connections and attachments
  • 1982: Development of incubators
  • 1992: Development of sanitary mounting blocks for pre-wall installation in PUR