Deutsche Wasser Holding GmbH serves as the holding company and strategic investor of the group. It provides the foundation for sustainable development, long-term growth and lasting stability. Its focus lies on the strategic advancement of the individual companies, the targeted networking of expertise and the promotion of innovation across the group.
Operational responsibility intentionally remains with each individual company – independently managed, regionally rooted and clearly focused in its area of expertise. Deutsche Wasser Holding invests in established mid-sized companies within Germany’s water and wastewater sector. We support their continued growth through strategic guidance, strong collaboration and long-term perspectives, while preserving the independence and identity of each company.
Experienced partner for municipal and industrial water and wastewater projects
Screening technology, swimming pools and custom stainless steel components for municipalities and industry
Reliable stainless steel components for a wide range of water and wastewater treatment applications
Technical components, electrical engineering and mechanical manufacturing for reliable water infrastructure
Plant manufacturing for sludge treatment, gas utilisation and wastewater treatment
Innovative solutions for plant manufacturing, process engineering and digital water and wastewater technology
Engineering services and process consulting for municipal and industrial water and wastewater projects
Turnkey water and wastewater treatment plants and innovative system technology
DWH – Deutsche Wasser Holding GmbH is a group of companies that has been committed to safeguarding drinking water and wastewater infrastructure in Germany for decades. We are grounded, reliable and closely connected to the people and regions we serve. From our headquarter in Arzfeld, in the Eifel region, we connect the expertise of our companies and create a structure that already ensures local presence and short response times across six German federal states.
The companies within the group bring together extensive expertise in plant manufacturing, process technology, component manufacturing, engineering, electrical engineering and the digital control of drinking water and wastewater systems. Together, they look back on hundreds of completed plant projects and a large number of successfully delivered solutions - forming a strong foundation for technologies that are both reliable and future-oriented.
Herbert Zahnen and Christian Männl (from left to right), Managing Directors of DWH Deutsche Wasser Holding GmbH
The group includes the Zahnen Technik Group and the ZWT Group, with locations in Arzfeld, Bayreuth, Lutherstadt Eisleben, Jüterbog, Rahden, and Rödermark. Each company contributes its own identity, specialist expertise and strong regional roots. At the same time, all companies benefit from the exchange of knowledge and experience within the group - technically, organisationally, and technologically. This creates reliable partnerships for municipalities, industry, utilities, engineering consultancies and distributors, supported by local contacts and well-coordinated teams.
Another key element of our work is our close cooperation with universities and research institutions. New scientific findings, advanced processes and innovative approaches are directly integrated into the ongoing development of our products. This ensures that our solutions not only meet the latest state of the art, but often go beyond it - setting new standards for the future of water and wastewater technology.
The challenges facing the water sector are growing: modernising existing infrastructure, adapting to climate change, meeting stricter environmental standards and managing increasingly complex technical systems. DWH was founded to address these challenges collectively and through combined expertise. We create reliable structures, drive innovation, strengthen collaboration and focus on sustainable solutions - while operational responsibility intentionally remains with the specialised companies on the ground.
This creates a group that combines the hands-on mentality of medium-sized businesses with the strength of a nationwide network. Anyone looking for an experienced and reliable partner in water and wastewater technology will find the right experts within our subsidiaries - regionally rooted, personally accessible, and backed by the strength of a modern group structure.
To combine the strengths of experienced medium-sized companies and develop high-performance, sustainable solutions for the water industry.
It creates the strategic and organisational framework for the group, while operational activities remain with the specialised subsidiaries.
Always the respective subsidiary – regionally rooted and specialised in its field of expertise.
Municipalities, industrial companies, utilities, engineering consultancies, distributors and research partners.
Through collaboration within the group, the transfer of knowledge and close exchange with universities and research institutions.
DWH Deutsche Wasser Holding GmbH
Bahnhofstraße 24
54687 Arzfeld
Germany