HAMANN AG is a worldwide recognized manufacturer of sewage and greywater treatment technology for the marine industry. Since being founded in 1972, we serve our clients helping them to meet ever stricter regulation on sewage discharge and thus to rise to our joint responsibility to protect the marine environment.

Our commitment to quality goes far beyond the R&D, engineering and manufacturing processes. The same amount of effort and attention to detail goes into every step that follows; from sales to engineering consultancy to commissioning and technical support many years later. We document that in our DNV accredited quality management system as well.

We offer a high level of customization for our HAMANN sewage treatment equipment and extensive consulting services to ensure the best possible solution for every project.

From there on, we make sure with excellent customer service that our customers have all the backup they need to operate their HAMANN plant during its entire lifespan. We do so with our highly qualified and experienced staff at HAMANN headquarters near Hamburg, Germany and with our global network of over 40 sales agents and service partners.

All that accounts for the fact that HAMANN plants ensure continuous high effluent quality, reliability in day-to-day operation and low maintenance to the benefit of our clients and the oceans.

HAMANN AG is a privately held company with founder Knud Hamann acting as Chairman of the Supervisory Board. All HAMANN sewage treatment plants are designed and manufactured at our facility in Hollenstedt, Germany.



Our team is at the customer‘s side from the early planning stage to operation. Direct, personal and flexible.


We are the specialists in sewage systems. We listen carefully, provide expert consultancy and then offer the best system for the customer‘s project. Providing customer specific solutions is part of HAMANN‘s DNA.


All our products are designed and made in Hollenstedt, Germany. Our quality management system is accredited by DNV to the ISO 9001 standard. High-grade materials and components and superb workmanship distinguish our products. That shows in the details like the quality of the welds on our pipes, frames and tanks as well as clean and secure cable routing.


Our GLOBAL NETWORK of more than 40 sales agents and service partners provides customer support and technical field service around the world. Wether you are in the market for new sewage system components or you need spare parts or technical service, either HAMANN AG direct or one of our official sales agents and certified service partners is there to help. Find the partner closest to you here on our website.

HAMANN sewage treatment equipment is designed and manufactured at our facility in Hollenstedt, Germany