BWT table-top water filter for perfectly tasting tea: it’s the water which makes a good cup of tea - BWT Best Water Technology 

BWT table water filter for perfectly tasting tea: it’s the water which makes a good cup of tea

19.9.2011 6:00   Mondsee

“The quality of a good cup of tea is 20% dependent on the tea and 80% on the water used,” according to Zhang Dafu, a tea master from the Quing Dynasty. Pure water, free from calcium and other such ingredients which can influence the taste and flavour of tea, bring out the aroma of the tea to the optimum. The BWT table-top water filter removes any undesirable and flavour-inhibiting substances from tap water. Thanks to the unique patented Mg2+ technology, the filter cartridge also enriches the water with the flavour carrier magnesium, creating the best conditions for perfect tasting tea.


This exquisite tea is characterised by its delicate flavour, floral aroma and light notes – the description on the packaging for a refined Darjeeling tea sounds very promising and would make anyone fancy a warming cup of tea when it’s cold outside. However, the cloudy fluid which emerges once the tea leaves have been left to brew in the cup have little in common with this description. After a short time, a thin and unappetising skin starts to form on the surface. In most cases, this is caused by the type of water used. Anyone wishing to enjoy a delicious cup of tea should therefore pay particular attention to selecting the water – the main ingredient in preparing tea.


Why tea tastes better in China and Japan
The mountain spring water valued by the Chinese in tea-making contains the ideal mineral balance and cannot easily be found in Europe. The water used in Japan to prepare tea is also significantly softer and has a lower calcium content than the water in Europe. Here, the composition of the water, the quantity of oxygen, the hardness level, the acid-base properties and the mineral content vary from region to region. The colour of the tea as well as the aroma and flavour are therefore also dependent on the type of water used.

4 basic rules should be observed in order to achieve optimal results in tea-making:


  1. Use fresh, cold water and do not leave the water to boil for too long:
    The oxygen contained in the water has a significant impact on the quality of the tea. Water left to stand in the pipe or in a kettle for too long will become stale and will have a lower oxygen content. This also applies to water from the warm water tap and to water which has already been boiled once. The consequence: hot drinks prepared with this water taste bland.


  2. Use water with a medium hardness level to prepare tea:
    The optimal water hardness level for tea is approx. 8 Grad dH (German hardness level). Harder water prevents the aroma from unfolding properly while softer water can lead to a bitter taste. Calcium carbonate (lime) which is contained in higher quantities in hard water can form an unappetising skin on tea when combined with other ingredients in tea. The tea therefore appears cloudy and forms bitter compounds. Green and white teas and the Darjeeling teas with a lower tannin content are very sensitive to hard water. Assam and Ceylon tea blends are more robust to the water hardness level.


  3. Take note of the acid-base properties of the water:
    The ideal pH value for tea falls close to 7 (neutral water). A tea prepared with neutral water has a clear colour which does not change even if left to infuse for longer.


  4. Use pure water to make tea:
    It’s not just calcium which can be detrimental to the flavour of tea; other contents such as chlorine, iron, organic impurities and foreign flavours and tastes can also have an effect.


Celebrate tea time with perfect water In order to obtain perfect water
for preparing aromatic and flavoursome tea from tap water, a table-top water filter should be used, such as that produced by the market leader in water technology: BWT – Best Water Technology. The primary function of a water filter is to filter out any calcium from the tap water. Thanks to its parented Mg2+ technology, the filter cartridge at the core of the BWT table-top water filter does much more: it also enriches the water with the flavour carrier, magnesium. The result is particularly flavoursome water – perfect for unfolding the best aromas of the tea. In addition to their unique technology, the BWT filter cartridges are also characterised by their long lifespan and fit all standard filter jugs from renowned manufacturers. For environmentally-friendly users, BWT also offers a cartridge in a refill version. The results of sensory tests also confirm the delicious flavour of BWT filtered water: people were able to taste the difference and preferred water prepared with BWT water filters to tap water and water filtered using filter systems by other manufacturers. The tea brewed using water from BWT tape-top water filters was awarded the best marks1.


Editorial notes:
The BWT table-top water filter is available in 3 sizes at a RRP of 19.95 euros (2.7 litres), 14.95 euros (3.3 litres) and 24.95 euros (3.6 litres). The ‘Design Colours’ version of the table-top water filter is available in 5 fashionable colours. The re-fill cartridges are offered at 17.95 euros (pack of 3). The BWT filter cartridges fit all standard table-top water filtering systems. For more information and press images, see


About BWT
The Best Water Technology group was founded in 1990 and is now Europe’s leading water technology company. Some 2,800 employees work at 70 subsidiaries and holding companies with the aim of providing customers from private households, industry, commerce, hotels and communities with innovative, economic and ecological water preparation technology comprising a high level of safety, hygiene and health. BWT offers modern preparation systems and services for drinking water and process water and for water used in pharmaceuticals, heating, boilers, fridges, air-conditioning systems and swimming pools. BWT research and development employees use the very latest methods and new processes and materials to develop ecological and economic products. An important aspect is to reduce the energy consumption of the products and thereby cut CO2 emissions.


Further informations:
BWT company informations:
Press contact: Spokesman
Press images: Table water filter


1 Source: SGS Institute Fresenius, 2009