Soft water - that's how it works

Soft water has many advantages - but also some disadvantages. Where soft water benefits and where it is detrimental, explains this article. How to make water softer, and what options there are.

Occurrence of soft water

In the case of groundwater, the particular soil condition determines the water hardness. Each region has its typical degree of hardness.

Rainwater contains virtually no dissolved alkaline earth salts. It is thus the softest possible water. The degree of hardness of rainwater is almost zero.

From a hardness of more than 8.4° dH one no longer speaks of soft water, but already of water of medium water hardness.

Benefits of soft water

Soft water contains very little calcium and magnesium. These two hardeners can therefore not fail or settle on heating. There is no to very little calcification.

This is especially beneficial for washing machines. If heating elements do not calcify, the life of the washing machine is significantly higher.

The detergent consumption is lower with soft water. Detergents must always be dosed according to the water hardness. The softer the water, the less detergent needed.

This protects the environment and makes the treatment of the wastewater easier. The more surfactants are in the wastewater, the more difficult is the treatment of the wastewater.

Coffee makers and kettles do not settle for lime very quickly. The lifespan of these devices is also increased.

Coffee and tea often taste more intense and aromatic in soft water. A high amount of dissolved cations, such as hard water, prevents full flavor development.

By preventing the stone deposit there is also no clogging of the water pipes.

Reduce water hardness

High degrees of hardness in the water can be lowered by means of water softening systems. So soft water can be made from hard water.

This can be done either locally - for example, before connecting the washing machine or at the tap. Another possibility is a central decalcification system for the entire house.

Rainwater can also be used as so-called process water for the washing machine. This eliminates the need for a water softening system. For the use of service water but a double piping system throughout the house must be available.

Reduction of limescale

Soft water does not leave limescale spots on the sink and on the shower walls. This requires a less intensive cleaning. The removal of soap and soap residue succeeds with soft water, however, harder than with hard water. This advantage partially lifts up again.

Tips & Tricks

Although the human body requires calcium and magnesium in comparatively large quantities, its share in hard drinking water is negligible for supply.

Video Board: How does a Water Softener Work?