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Laundry

Operate your washing machine with rainwater

Laundry washed with rainwater is drying on a washing line in the garden

Rainwater for the washing machine?

Provided it is installed correctly, using rainwater in the washing machine is completely safe.

Komplettset »Haus und Garten Standard«

Complete kit
»Standard Home and Garden«
3,000 to 10,000 litres

Komplettset »Haus und Garten Comfort«

Complete kit
»Home and Garden Comfort«
3,000 to 10,000 litres

The bacterial count of soiled, unwashed laundry is the same as the bacterial count of rainwater. So after washing, everything is not just clean, but pure. And if you live in an area with highly calcareous tap water, the softer rainwater from a cistern is often even better for the laundry than the hard tap water.

Advantages

Using rainwater for washing clothes has a number of advantages.

Lower water bills

Using rainwater stored in a cistern enables significant savings in drinking water and, consequently, a reduction in water bills.

Less washing powder and no fabric softener

Compared with hard, limescale-containing tap water, rainwater is soft and limescale-free. This allows for savings of up to 60 per cent on washing powder. Furthermore, there is no need to use fabric softener, as the soft water automatically makes the laundry softer.

Less wear and tear on the washing machine

Using rainwater also reduces wear and tear on the washing machine.

The myth that it is unclean and full of germs

A widespread myth is that rainwater is impure, unhygienic and full of germs because it lacks drinking water certification. In fact, the exact opposite is true. In a properly installed water supply system, rainwater is one of the purest forms of water.

This is how the water stays clean

Rainwater falls from the sky free of germs and is channelled via the guttering through several filters into the cistern. As it is stored in a cool, dark place, all germs settle out of the water and bind with suspended solids, which are then removed from the cistern via the overflow siphon.

Natural water instead of chemicals

So, only natural, pure water is used for washing, whereas drinking water only achieves its quality through the addition of chemicals such as chlorine.

Installation

Installation is usually straightforward, as the washing machine is usually located in the basement and therefore at the same level as the cistern. In addition to the cistern, only a domestic system pump and a separate pipe are required.

Recommendation

Using rainwater for washing laundry is a sensible consideration for anyone who is planning to install a cistern or already has one. In the long term, this installation can save a lot of money, while the laundry will be hygienically clean as usual.

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