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General information on water treatment

Why does water treatment make sense?

Our water works provide us with impeccable drinking water that can be enjoyed without any further treatment. However, only 2 - 5 % of the water used in a household is used for drinking or cooking. Bathing and showering, flushing the toilet, washing, etc. account for a much larger part of the water we consume.
The more calcareous the water and the more it is heated up, the more scale precipitates. The scale may then settle in the pipes and lead to scale deposits that in turn cause energy losses. Scale deposits result that lead to energy losses. The entire household up to and including the, often expensive, fittings and appliances in bathroom and kitchen should therefore be protected against costly damage.
Aggressive water causes corrosion in the pipe system, which might entail costly consequential damage. Depending on its natural composition and the intended use, the water therefore has to be treated to prevent scaling and corrosion. Thanks to Grünbeck’s dosing technology, the formation of scale in pipes can be reduced. Furthermore, a protective layer is generated on the inside of the pipes that protects your installation - for instance from the formation of rust or pitting.

What are the advantages of soft water?

  • Maintains the value of your real estate
  • Protects your household appliances
  • Provides more enjoyment of tea and coffee
  • Water filtered by a water softener provides a pleasant feeling on the skin
  • Saves time and money thanks to the easy cleaning of kitchen and bathroom
  • Protects environment and resources

What are the consequences of calcareous water?

  • Limescale spots form on dishes, glasses and cutlery  
  • Scale settles on water taps, bath tubs, shower enclosures or wash basins
  • Limescale in the toilet
  • Due to scaling in the pipes, the total flow is no longer a given
  • Cleaning kitchen and bath is highly time-consuming and laborious

When do you refer to hard water?

The water hardness is measured in “Degree German Hardness” (°dH) or in mmol/l. Starting from 2.5 mmol/l (14 °dH), the water is considered to be hard. The higher the degree of German hardness, the more calcareous the water. In case of a water hardness of 2.5 mmol/l (14 °dH), this amounts to approximately 250 g of scale per cubic metre of drinking water. At 2.5 mmol/l (14 °dH) and an average water consumption of a four-person family, this adds up to approximately 30 kg of scale within only 1 year.
The water hardness can be determined with a water test kit for total hardness.
We recommend a residual hardness of 0.54 – 1.07 mmol/l (3 - 6 °dH). The new German Drinking Water Ordinance, however, does not stipulate any limit value.

How does the scale get into the drinking water?

When flowing through the ground layers, rain water accumulates mineral substances, e.g. the hardness forming ions calcium and magnesium.

How can I prevent scale in drinking water?

By using a water softener working according the ion exchange principle. Thanks to this process, the hardness forming ions calcium and magnesium are replaced by sodium ions.

How does the ion exchange process work?

The nature-identical ion exchange process has been well-proven for decades. EN and DIN standards as well as the „DVGW-certificate“ mark guarantee that this process and the systems used are state-of-the-art and comply with statutory provisions. The core of a system for water softening by means of ion exchange is the exchanger material. It consists of a synthetic resin whose particular characteristic is its ability to exchange of ions dissolved in the water. Initially, the exchanger material is covered with sodium ions. If hard water is directed over the resin, the sodium ions present are exchanged for the calcium and magnesium ions contained in the water. After a certain amount of water has flown through, the surface of the exchanger material is completely covered by calcium and magnesium ions instead of sodium ions. No additional exchange can take place; the exchanger material is exhausted. In order to regenerate it, the calcium and magnesium ions have to be removed from the resin surface again. To do so, a brine solution is passed through the exchanger. Now, the calcium and magnesium ions change places with the sodium ions again. Thus, the exchanger material is regenerated and once again ready for operation. For the regeneration of the ion exchanger resin, regeneration salt is required. After each regeneration, the ion exchanger material is automatically disinfected with chlorine generated by means of electrolysis.

Why should I install a Grünbeck water softener?

Grünbeck Wasseraufbereitung GmbH is the market leader for water softening technology in Germany and stands for reliability and effectiveness. The advantages of our innovative softliQ water softeners are:

  • Powerful technology for excellent water quality
  • Easy installation and maintenance-friendliness
  • Operator-friendly: control via integrated TFT colour display, the myGrünbeck app or our website
  • Interconnected: standard Wi-Fi connection with complimentary smartphone app "myGrünbeck"
  • Autonomous: fully automatic provision of the desired soft water
  • Sustainable: low salt and power consumption for resource-friendly use
  • Unique: Soft-Close function to quietly close the lid of the brine tank – as if by magic
  • Hygienic: easy and clean maintenance thanks to the separation of brine tank and technical equipment
  • Aesthetic: smooth organic design – remarkably timeless
  • Independent: automatic or individual setting of the consumption volume
  • Efficient: quick cleaning of the brine tank thanks to modular design

1 mm of scale deposits corresponds to approx. 10 % more energy consumption!

Is there a negative impact when calcium and magnesium are exchanged?

No. Although magnesium and calcium are very important for our organism, drinking water only plays a minor role in supplying these substances in sufficient amounts, however. Food plays a much more substantial role in this context. You can, for instance, meet your daily requirement of calcium either with 20 litres of drinking water or a single pot of yogurt.

What’s the difference between a single, a twin and a triple system?

The single system only has one exchanger bottle. During the regeneration period, only hard water is available.
The twin system – also referred to as alternating system – ensures a continuous soft water operation as it alternates between two bottles.
The triple system features three exchanger bottles. Bottles 1 and 2 work in parallel. As soon as the capacity of bottle 1 is exhausted, an automatic switch-over takes place, so that now exchanger bottles 2 and 3 work in parallel while bottle 1 is being regenerated automatically.
As soon as the capacity of bottle 2 is exhausted another switch-over takes place and then exchanger bottles 3 and 1 work in parallel while bottle 2 is being regenerated. This way, soft water is available at all times.

What are the operating costs of a water softener (power/waste water)?

Approximately 2 Euros for power, approximately 15 Euros for water/waste water and about 15 Euros for regeneration salt per year. (These figures apply to an average three-person household and a degree of hardness of approximately 3.57 mmol/l (20 °dH))

How much salt does such a system need?

About two bags of salt of 25 kg each. (These figures apply to an average three-person household and a degree of hardness of approximately 3.57 mmol/l (20 °dH))

Is the salt harmful to health? Can it cause problems with blood pressure or blood circulation?

There are no health risks. Water softeners comply with the strict stipulations of the German Drinking Water Ordinance. The water softener only adds sodium, not sodium chloride. Furthermore, the amount added is only quite small.

What is the water quality like after softening?

Even after the softening, the water quality still complies with the requirements of the German Drinking Water Ordinance.