Water Softening

Water hardness is a term or value describing how much limescale is solved in the water. Hard water is not a health issue. On the contrary the human body needs minerals to stay healthy.

Nevertheless for pipes, engines and machines it can be necessary to soften the water to avoid incrustations. Ion exchangers are used to reduce water hardness. They exchange calcium and magnesium ion from the hard water with sodium. This substance doesn’t settle in the pipe and therefore can’t harm the system. For the chemical reaction salt (NaCl) and water needs to be added. Around 1 kg salt and 40 L of water for one cubic meter of water with a German hardness of 20 dH.

In some case fully salt free water is necessary – in these cases water softening is the only solution. In many cases, such as private homes or industrial water, limescale is not the problem. Moreover the settling of the limescale causes problems.


Merus RingA Merus Ring is not a Water Softener

With the Merus Ring limescale stays solved in the water, it doesn’t settle in the pipes and systems. This means that it stays in the water – the hardness of the water stays the same. Whereas the effect is similar to this of water softeners.

The advantage is that the installation of a Merus Ring is easier and cheaper than of a ion exchanger. Additionally it has lower maintenance costs as no salt needs to be added.