WISY AG is a leading manufacturer of all components of a modern rainwater harvesting system. With over 25 years of experience, we manufacture our products in our factory in Hessen Vogelsberg – near Frankfurt. Own development, research and production ensures a high quality in durability and reliability. In public buildings such as schools, hospitals, offices and football stadiums the WISY products guarantee outstanding rainwater supply. Homeowners will appreciate the easy functionality and low maintenance of WISY rainwater units.

Company details

Oberdorfstr. 26 , Kefenrod , 63699 Germany
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Business Type:
Industry Type:
Water and Wastewater
Market Focus:
Globally (various continents)

WISY AG has its company headquarters in Hitzkirchen, a small town surrounded by meadows and forest within the boundaries of the Vogelsberg nature recreation area in Hesse, Germany.

The company began producing rainwater filters in 1989. Thanks to its unique filtering concept and its success in systematically developing its product range, WISY AG quickly grew to become the leading manufacturer of high quality rainwater harvesting systems. WISY is now securely established as a global supplier of rain harvesting products with partners in over 40 countries. In addition to manufacturing high-quality products, the company has always understood the importance of product-specific training. In an in-house training centre, more than 10,000 installers and distributors have since received instruction in the fundamental principles of rainwater harvesting.

WISY is a founder member of the German Association for Rainwater Harvesting and also participated in the DIN committees which drew up the currently applicable standards. The durability and reliability of its products are a distinctive feature of the WISY brand.

WISY´s products have consequently found use in many thousands of projects around the world, especially where professional rainwater harvesting solutions are required. It is in public buildings in particular - scholls, hospitals, and fire stations, for example - that WISY products can guarantee a reliable rainwater supply. Private home owners appreciate the easy of use and the extremly low maintenance requirements of WISY´s system.

The name WISY is synonymous with quality and durability!

We wish you a great deal of enjoyment from our products.