Water filter comparison 2018

Purchase advice for the water filter comparison or test 2018

  • High calcium content in tap water causes many people to get a water filter. Although lime is not harmful to humans, filtering limescale protects household appliances and saves descaling.
  • Various technologies are suitable for filtering tap water: ion exchangers exchange lime-forming calcium and magnesium ions in the water for sodium ions. Reverse osmosis filters filter water through a one-way permeable layer that retains suspended solids. A charcoal filter works in a similar way, in which suspended matter accumulates out of the water.
  • Different water filter types with different properties and applications are commercially available: e.g. Table water filter, filter for taps, domestic water filter or travel filter for foreign countries.

Water filter comparison 2018: 2018

The tap water in Germany can be safely drink thanks to strict controls - 92% of respondents think that a study was conducted by the Association of Municipal Enterprises (VkU), which has collected data on the quality and use of drinking water for several years.So why buy a water filter?

The survey also shows that every 12th German is not convinced of the quality of our drinking water. The German Drinking Water Ordinance only applies to our house connection, From there we are responsible for the quality of the drinking water. Harmful substances may already be in the groundwater, for example due to nitrate pollution from agriculture. Other toxins come from our wastewater, because waterworks can not filter all pollutants out of the water. In particular, drug residues are often not filter.

Substances that contaminate drinking water can also be contaminated in in-house pipelines: lead, nickel, copper or cadmium can be detrimental to our health. Rust, lime and a particularly high degree of hardness of the water are not harmful, but this can make coffee or tea taste worse. A drinking water filter can help here. Also for the treatment of baby food offers such a water filter. In our water filter comparison 2018 we present you different types of water filters and table water filters in particular and show you which properties your water filter test winner should have.

1. Water filter: tasks, types, special form can systems

1.1. What is a water filter and what water filter types are there?

A water filter serves to improve the quality of water. To achieve this improvement will be Particles such as turbid substances, germs or other substances dissolved in the water are removed or reduced in their concentration. There are different categories of water filters in the home:

Water filter comparison 2018: water

A tap water filter is connected directly to the outlet on the tap.
  • Faucet Filter - is screwed directly under the faucet
  • Domestic water filters - is integrated into the main water pipe of the house
  • Water filter - Can system in which one fills tap water from the tap

You are probably wondering why one should resort to a can system, if you can filter with a tap filter equal to any water from the tap. In our water filter comparison it should be around Water filter go.

But we have the same again Advantages and disadvantages of faucet and table water filters compiled:

  • Water filter reliably filter chlorine, lime and other harmful substances.
  • Faucet Filter filter drug residues, Legionella (waterborne bacteria), heavy metals, germs and pesticides.
  • Table water and tap filter do not need electricity.
  • Water filter allow a better taste of water, tea and coffee.
  • Faucet Filter they hardly filter or lime, because the water is running at high pressure and fast through the filter.
  • Lots Faucet FilterModels often do not work with low pressure boilers.
  • Water filter Also, minerals such as e.g. Magnesium, which are important for the body.
  • Not all Water filter are equally good (some give, for example, silver to drinking water).

1.2. How does a table water filter work?

To protect yourself from harmful substances in drinking water, it's enough to filter the water that you drink without cooking it first. In the household, this can be done by so-called can systems (also: water filter cans or table water filter) happen, with which the water is first tapped and then processed.

Water filter comparison 2018: filter

Although a table water filter only filters small amounts of water all at once, it is completely sufficient for use with food.

Mainly Systems that are able to remove organic substances from drinking water: Reverse osmosis membranes, activated carbon filters, a combination of both, ion exchange or organic material such as stones.

You can read more about the individual processing methods in Chapter 3 of this guide.

Table water filters usually have a capacity of 2 to 3 liters. You fill these directly with the faucet Tap water, which initially runs slowly through the filter used, The most inexpensive water filters do not require power and usually reliably filter chlorine out of the water and act as a scale filter.

2. Drinking water in Germany: Is a water filter useful?

2.1. Pollutants in drinking water

First, we have to ask ourselves which components can be filtered out of the water:

  • Bacteria and germs
  • lime
  • chlorine
  • Heavy metals (e.g., antimony, iron, copper, arsenic)
  • Nitrite (NO2)
  • Nitrate (NO3)
  • radioactive pollution

Water filter comparison 2018: 2018

Using filtered water for the kettle or coffee maker eliminates the need for regular descaling.

The drinking water provided in Germany meets the requirements of the drinking water Regulation and is examined at regular intervals. The Drinking Water Ordinance sets limits for ingredients in water.

In this country, a good water quality is guaranteed and it is said that drinking water is the most strictly controlled food in Germany. This statement is true, because The limit values ​​for pollutants are much stricter for drinking water in Germany than for other foods.

Nevertheless, there are expert opinions such as the water filter manufacturer Michael Hank, who advises "Be sure to filter your water, There is not a limit to everything. ETH Zurich was able to prove, for example, that drinking water contains significantly more bacteria than conventional methods make us believe, "says Hank about German drinking water compared to WirtschaftsWoche.

2.2. How is German drinking water controlled?

Drinking Water Facts
  • The Freshwater shareon earth - the livelihood of all living beings - is only 1% of total water resources.
  • Europe produces more than 60 million tons of plastic yearly; more than 5 bill. Plastic parts drift in the waters of the earth and release components into drinking water.
  • The pharmaceutical industry represents 80,000 different Drugs that get into the water after their use and can hardly be filtered out by sewage treatment plants.
  • Chemical contaminated sites from wars were disposed of in lakes, rivers and seas and still release toxins; in European waters, there are 600,000 tonnes of warfare agents alone.

Drinking water is extracted from groundwater 64%, the rest of the water comes from surface or spring water. Through filtering, possible disinfection, demineralization, softening and deacidification as well as the use of chemical, physical and biological processes, it becomes drinkable water.

However, drinking water may contain substances that can endanger our health. Although drinking water treatment guarantees good quality water, it does, for example old pipes in houses can pollute the water.

Houses built before 1973 may have lead pipes. Lead is a heavy metal that acts like a neurotoxin. In particular, it can be dangerous for children and women during pregnancy. Effects of lead in drinking water can e.g. Kidney damage, increased blood pressure, miscarriage and premature birth, damage to the nervous system, decreased fertility or brain damage.

Lime is also often in the drinking water - recognizable by a cloudy haze or limescale such. in the water or egg cooker. However, lime-containing water is not dangerous, as originally thought. but even healthy, because it contains a lot of calcium. The mineral calcium ensures in the human body namely u.a. for reducing the risk of osteoporosis.

Conclusion: Although the drinking water in Germany has a high quality throughout and is subject to strict controls, but to ensure that you have no harmful substances in your own drinking water, the use of a water filter makes sense.

In the following video the alternative practitioner Andreas Frenzel goes to the Sense and nonsense of water filters to the bottom:

3. Types of treatment processes for drinking water

There are on the market different filter systems for drinking water treatment for different requirements, What technology is suitable for what, we would like to explain to you here:

treatment processProperties and applications
Ion exchange water filter

Water filter comparison 2018: comparison

  • replace anions and cations by other ions in the water (example: calcium and magnesium ions are exchanged by other cations)
  • serve as Water softener, reduce lime content in the water.
  • uncharged organic and inorganic substances Ion exchangers pass unhindered
  • Applications: et al Dishwasher, to increase the water hardness against limescale
Reverse osmosis water filter

Water filter comparison 2018: comparison

  • to be cleaned water is under pressure semipermeable (one-sided permeable) wall driven - won water meansosmosis water
  • Osmosis water filters filter out most of the particles or large molecules; e.g.Heavy metals, nitrates or Phosphate
  • filter out valuable minerals and trace elements
  • need a pump and electricity
  • Applications: e.g. Desalination of sea water, production of non-alcoholic beer
Activated carbon water filters

Water filter comparison 2018: 2018

  • Activated carbon consists of Carbon, at the Filter surface collect filtered substances
  • can be unpleasant Tying smells and tastes
  • can dissolved organic trace substances (e.g., pesticides, bacteria), chlorine and drug residues by adsorption (filtered substances collect on a solid surface) from the water
  • becomes moist when used as a water filter - potential germination on the surface
  • Applications: are used in many industries, e.g. for sewage treatment, in air conditioners or catalysts
Table water filter rationale: Most table water filters use the same basic principle. Water passes through activated carbon in the filter and this stores organic matter. Most filter cartridges contain synthetic resin that exchanges calcium and magnesium for hydrogen. The filtered water will be like that poorer in minerals and less hard.

OnDisadvantage of the activated carbon filter is that they need to be changed quite frequently, to prevent germ formation. With a dirty filter, the germs would get into the filtered water.

4. Purchase advice for water filters: These criteria are important

Water filter comparison 2018: 2018

The Stelton brand water filter can clean tap water.

Table water filters are primarily used to the Taste of water, tea and coffee to improve and to reduce lime deposits in coffee machines or kettles.

4.1. Filter Properties: Speed ​​& Filter Performance

Although the filter speed only plays a secondary role, it is certainly advantageous if you do not have to wait unnecessarily long for the filtered water. The average duration of filtering drinking water for most appliances is between 1 and 2 minutes per liter.

Stiftung Warentest has tested table water filters, so-called small water filters, in issue 5/2015 and has come to the conclusion, with regard to filter performance, that most filters are able to filter out pollutants such as lead, copper or chlorine. Some table water filters have a microfilter that can even remove bacteria; e.g. Water filter of the manufacturer Cleansui.

Important: If you live in an older house equipped with lead pipes, be sure to buy a water filter that performs well to filter out pollutants such as lead to protect your health.

4.2. Water tank and equipment of the can system

Water filter comparison 2018: comparison

The manufacturer Brita also offers specially shaped water filters that can be found in the fridge.

Most water filter cans can hold between 1.4 and 2 liters of water and have a total volume of 2 to 3 liters. Most table water filters are made of plastic and can be cleaned in the dishwasher (e.g., brand models of Brita, BWT, PearlCo or Stelton).

Water filters can also have special Ads and features feature that simplifies handling:

  • a filter change indicator
  • an electronic timer
  • a microfilter
  • Possibility to set the date
  • additional enrichment with magnesium during filtering

4.3. Filter cartridges and their change

Table water filters usually have a cartridge that serves to clean the water. Lime, chlorine and also residues from water pipes (eg lead) are filtered out of the drinking water. The filter cartridge must be changed at regular intervals.

It is helpful if the pot has a filter change indicator that informs you when to change the cartridge. The filter capacity of an activated carbon filter is on average around 100 to 180 liters of fresh water.

Water filter comparison 2018: filter

The filter cartridges from BWT additionally enrich the water magnesium on.

By buying new filter cartridges you will incur follow-up costs. The prices are very different and vary from manufacturer to manufacturer. Make sure you buy a water filter that also allows you to use third-party cartridges. These cartridges are usually much cheaper than the original filter cartridges from the manufacturer.

Tip: Some manufacturers offer cartridges together with the water filter pot as a package, so you are fully equipped for half a year or a year and do not need to buy new filter cartridges. Such packages are often much cheaper than single purchases.

4.4. Purchase price - water filter cans

Water filter cans do not cost a lot in the purchase. Cheap water filters are available from about 15 euros. In the middle price range, the devices cost between 35 to 50 euros and expensive models cost sometimes between 70 and 80 euros. The expensive water filter cans are often equipped with a microfilter.

5. Water filter: Tips for hygiene

Not only the information of the manufacturer is to be considered, if you want to change the filter cartridge, but also auf Cleanliness when changing the filter it depends. Here are some tips to keep in mind when it comes to the hygiene of the water filter can:

Water filter comparison 2018: comparison

To clean a filter can denture cleaners are.
  1. Deposit the Water filter in the fridge - especially at night.
  2. Clean the water filter under flowing, warm water with detergent or salt water.
  3. Take Tablets for denture cleaning for cleaning the water filter to help.
  4. Do not use the water filter can in the dishwasher to clean, since this can attack the plastic.
  5. Use a filter change also for Cleaning of jug and filter holder.
  6. water should always be generally protected from light and cool be stored to prevent nucleation in water or filter.

6. Questions and answers about water filters

6.1. Can I build a water filter myself?

You can also build water filters yourself, where you should not assume that the home-made models can always provide the same filter performance such as industrially produced water filters.

For the DIY you need the following Material - depending on filter size:

  • Water filter for 1 to 2 persons: a 2 liter plastic bottle
  • Water filter for 3 to 4 persons: a big bucket and a big other vessel
  • Water filter for 5 to 8 people: a 30 liter canister
  • Water filter for 6 to 20 people: a big barrel

Water filter comparison 2018: water

Instead of charcoal, you can also use activated carbon pellets.

You will also need:

  • another big vessel
  • coarse gravel
  • fine gravel
  • sand
  • Fabric or cotton wool
  • charcoal

How it works: The water flows through the filter layers and the dirt particles are retained in the various layers. The charcoal is able to filter out a large part of the pathogens, chemical impurities and bad odors, Detailed instructions of the GEO travel community for the construction of your own water filter can be found here.

6.2. Which drinking water filter is suitable for trekking?

Water filter comparison 2018: comparison

A travel water filter of the brand Carbonit, which is screwed as an adapter on a faucet.

For a hiking tour, an outdoor water filter or travel water filter is suitable. With this you can filter contaminated water from lakes or rivers and then drink. Outdoor filters have a particularly powerful filter membrane that filters out viruses and bacteria.

Even when traveling to countries where the drinking water is of questionable quality, a travel or outdoor water filter is recommended to prevent typical diseases such as vomiting or diarrhea. Furthermore, have outdoor filters often have compact dimensions and are easy to use.

6.3. Is it worth the purchase of a water filter for particularly hard water?

Drinking water is not the same everywhere in Germany. In some areas, for example, there is relatively hard water with a drinking water hardness of more than 12° dH. The harder the water, the higher the maintenance of water heaters, such as. Dishwashers or washing machines. In addition, more washing and cleaning agents are usually consumed.

Water filter comparison 2018: filter

When buying a table water filter, also pay attention to the availability of the filter cartridges.

Beverages such as tea and coffee, which are prepared with water, can be influenced by hard water negative taste. Here, a water filter can remedy and help to soften the water. The activated carbon filters can filter out unpleasant taste and smell from the water.

6.4. How long can I use the filter cartridges?

It is advisable to use the filters no longer or more often than specified by the manufacturer. On average, that's just under four weeks. It is not necessarily about how much water you filter with the water filter can, but how long the water filter cartridge is already in use.

Even if you filter only a little water, sThe cartridge should be exchanged after about a month, to prevent the emergence of germs. On average, the filter capacity of an activated carbon filter is 100 to 180 liters of fresh water.

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