We are the original

At the beginning of the 1970’s aeration systems no longer met the requirements of waste water treatment. Forty years ago Arnold Jäger, 2nd generation owner of Gummi-Jäger based in Hannover, Germany, developed the first rubber membrane diffuser. Since that time, the innovative rubber EPDM-membrane diffusers have saved energy and processing costs.

Since 1975, Jäger has produced more than 35 million membranes and diffusers for the leading manufacturers of waste water companies all over the world. During the last four decades, Arnold Jäger and his sons have taken out more than 30 patents on aeration technology in Europe and the USA.

Dr.-Ing. Andreas Jäger, oldest son of Arnold Jäger, joined the company in 1995. Under his leadership the development team of the Jäger Group perpetually improved the aeration technology. In order to meet the growing importance in the field of aeration systems, all German Jäger activities concerning waste water treatment have been transferred to Jäger Umwelt-Technik GmbH in 2007.

At the same time, Jäger’s American  business has been sold to Claudius Jäger and is today branded as Gummi-Jaeger Aeration. The product portfolio of Jäger Umwelt-Technik GmbH (Hannover, Germany) and Gummi-Jaeger Aeration Inc. (Longmont, USA) is based on their mutual heritage up to 2007. Since then both companies have individually developed specific products for their markets / customers.

Therefore, nowadays the product lines may look similar, but bear significant technical differences.

In 2005 Jäger complemented its diffuser business with the Cleartec Biotextiles technology. Introducing the innovativ fixed film process into the global marketplace Jäger Umwelt-Technik GmbH has developed from a component supplier into a true process company.

Jäger-Umwelt-Technik GmbH is formulating and processing all rubber compounds in house in its own mixing facility. We produce the best suited membrane materials for municipal and industrial applications based on our 40 years experience.

All Jäger Umwelt-Technik GmbH products are „Made in Germany” and are based on constant innovation by German engineering.



The used materials and production processes reflect our decades of experience. JetFlex® diffusers’ HD, CBD, TD and SD performance data fulfill all requirements. Due to the broad range of accessories our JetFlex® diffusers may replace any existing systems on any available aeration grids. 

  • Our core competence is providing unique aeration solutions for biological wastewater treatment.
  • Our success is based on continuous product innovation, friendly, competent service and zero-defect philosophy.



In addition to our standard product range we implement our customers’ ideas and demands into tailor-made membranes and diffusers. Many renowned waste water companies effectively use our experience of waste water resistant materials, innovative production technology and complete quality control. In that way they benefit from distinctive energy efficient designs and, thus, produce sustainably competitive advantages.

We enable our customers to comply with almost every effluent specification and project-specific life cycle cost requirements. State of the art engineering tools (CAD, CAM, FEA), in house medium scale testing and evaluation facilities and the close cooperation with research organizations, such as the Leibniz University of Hanover or the German Institute for Rubber Technology (DIK), ensure further continuous improvement and innovation.