Clear Rainwater for your Flowers

Rainwater is your gardens first choice for irrigation.

How to store rainwater

Four easy steps to keep your rainwater clear for a long time

WISY filtering principle

What makes our filters so unique?


2016 Olympic Games and 2014 Football World Cup:
Perfect playing turf through rainwater harvesting

We have been designing and manufacturing low-maintenance filters with stainless-steel mesh since 1989. These filters are in use all over the world - both in production processes and modern rainwater harvesting systems.

WISY's energy-saving pump controllers for water pumps are breaking new ground when it comes to power consumption in standby mode. Our product portfolio is completed by our break tanks for separating the process water circuit from the mains water supply.

We are the world's leading engineers of rainwater harvesting equipment. We are offering an entire system for filtering and storing rainwater cleansed in four stages, as well as all the other components you will need to create your own reliable water supply.

WISY quality - Made in Germany