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!


88. Darmstädter Seminar
IWAR Abwassertechnik

Meet us at the technical exhibition.

25. May 2016



IFAT 2016

Meet us at our booth 427
in exhibition hall A3.

30. May - 03. June 2016
Messe München




Looking forward to meeting you at our booth.

September 24-28, 2016
New Orleans Morial Convention Center