Welcome to the OTT Group!

Passion for Quality and Efficiency in Biological Wastewater Treatment – For More Than 25 Years!

We manufacture MAGNUM® and STANDARD fine bubble tube diffusers as well as FLEXNORM® (EPDM) and FLEXSIL® (silicone) membranes in our own production facility with Made in Germany quality. We also develop and install turn-key aeration systems for high-performance municipal and industrial wastewater processing. Our HE® programme offers customers wide-ranging options for significant energy savings and/or increased throughput capacity.

Visit us in Langenhagen / Germany for informative discussions and a glance behind the scenes at our plant – or at our exhibition booths at trade shows for the wastewater sector. Please stop by – we look forward to seeing you!



Meet us at booth K 10 / J09 of AQUAMEC.

16.-18. August 2016
São Paulo




Looking forward to meeting you at our booth.

September 24-28, 2016
New Orleans Morial Convention Center



Iwater International Integrated Water Cycle Show

Meet us at the booth of INGAPRES.

15.-17. November 2016