Soft water ensures a feeling of well-being in the shower, noticeably softer skin, smoother hair and softer laundry. Plus: It protects your home from annoying limescale.

The best water in your home

Optimum water quality

The best quality drinking water is essential! It doesn't matter whether you drink a refreshing glass of water, use it to brush your teeth or need it to wash your salad.

Junge trink sauberes Wasser Junge trinkt sauberes Wasser

Perfectly treated heating water ensures efficient operation of your heating system. You will save money and enjoy a cosy, warm home at the same time.

Frau genießt wohlige Wärme im Raum Frau genießt wohlige Wärme im Raum

Innovative water treatment for optimum water quality in your home

From the boiler in the kitchen to the taps in your bathroom - BWT prod­ucts ensure your water is in the safest of hands in all areas of life! Together with our part­ners in the instal­la­tion trade and the BWT Best Water Profes­sionals, we have the best water treat­ment solu­tions for your home. Drinking water filters for hygien­i­cally clean drinking water, Luxury Water and limescale protec­tion systems for inno­v­a­tive protec­tion against limescale or the treat­ment of water for optimum heating perfor­mance - you can rely on BWT for all of these things!

Water – the life blood of your home

Perla house
Perla house


Water is an important part of our lives, day and night. BWT prod­ucts that opti­mally treat your water will allow you to sit back with a clear conscience and trust in the best water quality and hygiene for you and your family.

E1 single-lever filter - drinking water quality can be so simple!

The BWT E1 single-lever filter will convince you with its ingenious concept and ease-of-use: The hygiene vault, the filter cup containing the filter element, can be replaced in a matter of seconds. The water can be shut off directly on the device in just one action - without requiring tools and without splashing water everywhere.

If you register your product, BWT offers a 10-year guarantee and an automatic reminder service by e-mail - ensuring you don't forget to replace the hygiene vault.

More about BWT drinking water filters
E1 Einhebelfilter

BWT Perla Silk

A modern , fully auto­matic & easy to use water soft­ener range that is designed to suit today’s modern lifestyles. Each model adapts to your water usage ensuring a constant supply of Luxury Water when you need it most.

  • Intu­itive Customer Inter­face
  • Advanced digital control system for maximum perfor­mance and effi­ciency
  • Smart power options for protected, inter­rupted, and non mains oper­a­tion
  • Brine check safety valve for added protection
  • Wi-Fi commu­ni­ca­tion avail­able across the range
  • High flow connec­tion kit for optimum flow rates
BWT Luxury Water systems
Perla silk

BWT AQA total Energy 2500

AQA total Energy 2500 is ideal for house­holds of up to 6 people. It offers optimum limescale protec­tion, even if water is dispensed from several places at the same time - for example if the washing machine is running while someone is show­ering and a third person is cooking.

In addi­tion to optimum limescale protec­tion, the system also offers effi­cient corro­sion preven­tion. AQA total Energy also supports the creation of a fine, protec­tive cover layer to prevent surface corro­sion in metal pipes.

BWT limescale protection systems
BWT AQA total energy

Softening v. Protection against limescale

Enthärtung vs. Kalkschutz
Enthärtung vs. Kalkschutz

Two methods to combat limescale and hard water

Many of us know the effects of hard water only too well: It leaves unsightly stains on fixtures and fittings in the kitchen and bathroom leaving shiny surfaces dull. It accumulates in household appliances, such as kettles or washing machines and unseen in pipes and central heating boilers.

With BWT’s technology you can choose to control the build-up of scale or remove it all together. Water conditioners work by altering the way the hardness minerals behave when the water is heated to prevent hard scale deposits forming. Whereas water softening removes those minerals from the water altogether enabling you to enjoy softened water throughout your home.

When hard becomes soft…

Soft­ened water produces no limescale, is kind to your hair, skin and clothes as it allows soaps and sham­poos to lather and rinse away more easily. With the need for less soap, deter­gents and specialist cleaners it’s kinder to your pocket and the envi­ron­ment. The BWT Perla Silk and WS range of water soft­eners work using the ion exchange prin­ciple, removing the magne­sium and calcium ions that make the water hard and replacing them with sodium ions.

Fewer limescale deposits and optimum water quality

Water condi­tioners use a range of tech­nolo­gies to prevent limescale settling in pipes, appli­ances and boilers. In essence they work by prop­a­gating tiny seed crys­tals from part of the calcium dissolved in the water, which in turn bind the remaining calcium together, these large crys­tals are then carried through the system without causing hard scale deposits.

These are often an ideal solu­tion for anyone who wants to leave valu­able minerals in drinking water but still enjoy safe limescale protec­tion.


We would be happy to help you find the BWT water softener that best suits your needs. Contact our BWT experts for advice.

Frequently asked ques­tions about water treat­ment in the home

What effects does too hard water have?

"Hard water leads to limescale depoits which can mean increased energy costs due to the reduced performance of boilers and hot water tanks. The frequent need to descale of coffee machines, kettles and instantaneous water heaters. Up to 50 % higher detergent consumption Significantly more work to maintain the bathroom and kitchen. The service life of water-bearing equipment can be significantly shortened, and premature failure more likely "

Where can I get further advice and who assesses the need to add minerals to my drinking water?

In the first instance obtain a full water annalysis from an independent surveyor and the contact your BWT Customer service team who will guide you through your options.

Can corrosion in water pipes cause damage to health?

Corrosion processes can cause heavy metals of the pipe material to enter the drinking water and impair the water quality. These metals can lead to health impairments, especially for infants, the sick and the elderly. It is always therefore recommended to allow the water to run freely to drain for several minutes after periods of non-use.

Why does hard water make household work more difficult?

Hard water especially when heated leaves small deposits of scale around your home. These take many forms, spots on glasses and cutterly, unslightly stains on tap and shower screens and as scum when combined with soap. These build up over time and are difficult to remove without specialist cleaners.

How does hard water affect the skin?

Hard water together with soap forms insoluble salts, called scum. This scum deposits on skin and hair. Many people then feel a feeling of tension on the skin and complain about dull, lifeless hair. With soft water the skin feels softer and silkier, the hair is shinier and smoother.

Why can hard water pollute the environment?

With very hard water, up to 50% more detergent is needed to achieve the same cleaning effect as with soft water. In addition, aggressive cleaning agents are often used to remove limescale stains from tiles, taps and sanitaryware - both pollute the waste water. Not to forget: Even a limescale layer of 1 mm on heat exchanger surfaces increases energy consumption.

Which devices is the hygienic safe suitable for?

  • BWT E1 single lever filter HWS
  • BWT E1 Single lever filter EHF
  • Cillit C1 single lever filter

How often does the hygiene safe have to be changed?

According to the standard, the filter element must be replaced every 6 months.

What does "inner pipe sealing" by mineral dosing mean?

BWT dosing units add a small amount (approx. 3 mg/l) of minerals to the drinking water in line with current water consumption. (Limit value of the drinking water ordinance: up to 5 mg/l). The minerals form a protective layer in the pipe which separates the pipe material from the water (inner pipe sealing). Existing sources of corrosion can be infiltrated and thus stopped. The inner pipe sealing can thus become a life insurance for your pipe installation, which is destroyed without appropriate protection and causes high consequential costs (pipe bursts, pipe replacement).

Does the sealing of the inner pipe also make sense with older, possibly already corroding systems?

Even already corroded pipe systems can be gently rehabilitated by mineral dosing. The protective layer prevents further contact of the aggressive water with the pipe wall.

Is it permissible to seal the inner pipe with phosphate minerals according to the "Food Codex"?

The mineral solutions from BWT (Quantophos) have food quality and the addition is permitted with tested dosing systems up to the limit value of 5 mg/l according to the Drinking Water Ordinance. Bewados dosing systems from BWT operate exactly in accordance with the requirements of the Drinking Water Ordinance and are precisely set at the factory.

How can corrosion processes in a domestic water system be identified?

In the case of galvanised pipe systems, the reddish-brown discolouration of the water is a problem. On rust or sand-like particles in the tap sieves. For copper pipes, the blue-green discoloration of the water and objects. For new installations, the probability of later corrosion can be determined by an expert through analysis of your water.

Do the dosed minerals in drinking water have a detrimental effect on the taste of food when used in the preparation or cooking ?

No, minerals have no effect on the smell and taste of drinking water. This also means that the cooking and preparation of food is not affected. Minerals are basic elements for the structure and metabolism of the human body and are contained in thousands of higher concentrations in other foods.

What are the concentrations of minerals in water and other foods?

The food-safe BWT dosage active ingredients are based on valuable phosphate minerals. Phosphates are contained in many foods and in the human body. They are a bone component, necessary for the metabolism and indispensable for brain and muscle activity. The limit value for phosphate is 5 mg/l according to the Drinking Water Ordinance.

What does ÖVGW/DVGW-tested mean?

The DVGW is the German Association of Gas and Water Experts, which lays down, among other things, the guidelines for the construction, testing and use of plants for the treatment of drinking water. The ÖVGW is the Austrian counterpart. While WRAS does a similar job in the UK. Devices bearing these test marks comply to local standards and may be installed in drinking water installations without further measures. Only tested devices are subject to strict testing with regard to the materials used, and hygiene.

A GS mark, CE mark or similar alone are no proof of compliance with the applicable requirements with regard to hygiene and process success in drinking water.

What is rust / corrosion?

The chemical reactions that occur when metallic materials come into contact with water are called corrosion. Corrosion is therefore a natural process, the best known form of corrosion is the formation of rust in iron and steel. A form of copper corrosion, for example, is known as "verdigris".

What damage is caused by corrosion?

Corrosion can cause premature failure in pipework, valves to stick and reduced efficincy in radiators. In extreme cases corrosion can cause blockages and reduced flow rates distrupting boiler performance and increasing costs. Microbiological impairment of drinking water (corrosion products are a habitat and food for dangerous bacteria, e.g. Legionella) . Stubborn discolorations on sanitary ware (partly not removable) and discoloured garments when washing laundry.

What measures should be taken to protect against corrosion?

The affects of corrosion can be mitigated against through good system design and good installation practices such as rinsing through new lines before they are sealed. The use of a particle filter like the BWT E1 and corrosion inhibitors like the AQA Nano and BWT Combi Care. And the strict adherence to all local regulations.

How are the minerals added to drinking water?

Electronically controlled dosing systems with DVGW approval mark record exactly the current water consumption via a built-in water meter. The electronics directly controls the pump via the consumption data, which doses exactly the required quantity of minerals. Bewados dosing systems from BWT guarantee the correct addition of minerals and are therefore extremely economical.

How often do I have to service my drinking water filter?

According to the standard, the filter element of the E1 single-lever filter or a spin-on filter must be replaced every 6 months. For backwash filters, the filter should be cleaned every 2 months.

Can the softening process be relied upon?

Yes, the ion exchange process has proven itself for decades in many millions of devices worldwide.

What is a water filter?

Read in the section "Worth knowing" our magazine article what a water filter is and which advantages it brings with it.

What is limescale ?

Read in the section "Worth knowing" in our magazine article what limescale is and how it gets into drinking water.

Are water suppliers obliged to provide clean water?

Your water supplier is the guarantor that you get drinking water delivered to your home. The strict principles for this quality are laid down in the Drinking Water regulations. However, in your domestic water network this quality can be lost through heating, different materials etc. - problems such as limescale and corrosion can develop. The responsibility for the drinking water changes when it enters your home from the supplier to the house owner. Thus the "operator of a drinking water system" is responsible and influence the quality of the water at the tap.
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