Rainwater harvesting

Making clever use of rainwater

With a rainwater harvesting system you can save up to 50 Percent of your daily fresh water consumption. This can be up to 70 litres per person per day (considering using the toilet, washing machine, garden watering and car washing). Given the increasingly expensive and complicated treatment of drinking water, the projected doubling of water prices in the coming years is only logical. So a rainwater harvesting system makes sense in two ways: it relieves and protects not only our environment, but also your finances in the long-term.


Save drinking water with rainwater

Saving on drinking water

Drinking water is scarce and expensive. In Germany the average person uses about 130 litres of drinking water per day. Half could easily be replaced by rainwater – in a four-member household that is about 90,000 litres a year. Those who use rainwater save drinking water, protect the environment, reduce the load on the public sewer system and thus also on their own pockets. This is because many city and local authorities promote the use of rainwater through grants or have a split wastewater charge.

Sewage charges

Wastewater charges

Wastewater costs arise, among other things, from the cleaning of wastewater and rainwater drained into the sewer system.

You can save this

Types of use for house and garden

Watering the garden

Rainwater is far better than tap water for watering your garden.

Using rainwater for irrigation

Toilet flushing

Flushing the toilet can easily save 40 litres per day.

Toilet flush


When properly installed, the use of rainwater in the washing machine is completely harmless.

Sustainable washing

Examples of industrial rainwater utilisation

Cleaning work

Cleaning with rainwater in industry or agriculture.



Cooling machines and buildings with rainwater.