Renovating drinking water pipes without epoxy resin with the original
Tap water enjoys an excellent reputation here in Switzerland, and rightly so. What is delivered by Swiss waterworks is of the highest quality and can be consumed without hesitation. It is important to preserve this quality over the last few metres, that is, inside the building itself. Yet the pipes hidden in the masonry are not immune to aging. Fear not, we can rehabilitate old drinking water pipes — from the inside, using our unique, global ANROSAN solution. The cement coating that we use for this is particularly sustainable.
The problem with drinking water pipes
As a property owner, it is important to take action when your drinking water pipes get old. Discoloured water, a fall in water pressure or sudden changes in temperature are all signs that your pipes are getting old. If this is the case, we can rescue your old drinking water pipes.
If your pipes are made of galvanised steel, you may notice rust-coloured water or a drop in water pressure which are signs that your pipes are at the point where they need to be renovated. If they are left untreated, corrosion can become so severe that it causes pipe leaks and water damage.
During renovations, it is common to come across pipe sections from earlier wet cells still connected to the freshwater network, hidden in the masonry. These sections are referred to as dead leads or stubs. If the flow in these pipelines is restricted, there can be a build-up of stagnant water, which can become a breeding ground for harmful germs. According to SVGW guideline W3d, such sections must be completely separated from the installation.
If your pipes are made of galvanised steel, you may notice rust-coloured water or a drop in water pressure which are signs that your pipes are at the point where they need to be renovated. If they are left untreated, corrosion can become so severe that it causes pipe leaks and water damage.
During renovations, it is common to come across pipe sections from earlier wet cells still connected to the freshwater network, hidden in the masonry. These sections are referred to as dead leads or stubs. If the flow in these pipelines is restricted, there can be a build-up of stagnant water, which can become a breeding ground for harmful germs. According to SVGW guideline W3d, such sections must be completely separated from the installation.
Analysis of drinking water pipes
The drinking water network is very complex. As such, an onsite expert should examine the entire drinking water installations in order to precisely assess the condition of the piping system.
It is definitely worthwhile to get a status analysis performed for buildings that were constructed 25 to 30 years ago. Our ANROSAN experts examine the drinking water installations onsite, determining which materials were used and what condition they are in. If we determine that the drinking water pipes need to be renovated and it is feasible, we will provide you with a binding quote for this using ANROSAN, based on our status analysis.
Price for the ANROSAN analysis: CHF 1290 or CHF 1790 for mixed installations.
It is definitely worthwhile to get a status analysis performed for buildings that were constructed 25 to 30 years ago. Our ANROSAN experts examine the drinking water installations onsite, determining which materials were used and what condition they are in. If we determine that the drinking water pipes need to be renovated and it is feasible, we will provide you with a binding quote for this using ANROSAN, based on our status analysis.
Price for the ANROSAN analysis: CHF 1290 or CHF 1790 for mixed installations.
Renovating drinking water pipes without epoxy resin
With ANROSAN, we can provide you with a sustainable internal pipe renovation for drinking water pipes in residential buildings. We use a unique cement coating that meets Swiss food packaging legal requirements.
Renovating the insides of pipes using ANROSAN prevents floors or walls from having to be torn open. As such, regular use of a building can continue throughout the entire renovation process. Provisional measures are implemented in order to ensure that the water supply can be used. The costs for the renovation of the drinking water pipes are significantly lower than those for replacing the entire installation. ANROSAN protects existing drinking water pipes from corrosion and leaks – doing so gently, sustainably and without the need for epoxy resin. As the coating material consists of purely mineral components, it is particularly clean and sustainable. And since cement coatings have been used in the public water network for around 100 years, they have been proven to work.
Renovating the insides of pipes using ANROSAN prevents floors or walls from having to be torn open. As such, regular use of a building can continue throughout the entire renovation process. Provisional measures are implemented in order to ensure that the water supply can be used. The costs for the renovation of the drinking water pipes are significantly lower than those for replacing the entire installation. ANROSAN protects existing drinking water pipes from corrosion and leaks – doing so gently, sustainably and without the need for epoxy resin. As the coating material consists of purely mineral components, it is particularly clean and sustainable. And since cement coatings have been used in the public water network for around 100 years, they have been proven to work.
- Rehabilitating water pipes is much cheaper than replacing a building’s water installations.
- In addition to sustainability and environmental compatibility, ANROSAN meets the ultimate standard, hands-down: the same drinking water quality that comes direct from Swiss waterworks.
- Cement, quartz sand and water form the basis of the coating material. These materials do not contain any additives, nor do they form a breeding ground for contaminating microbes.
- Cement mortar coatings have proven themselves for decades, lining the pipes in Switzerland’s public drinking water networks.
- ANROSAN’s coating material is suitable for application areas up to 200°C. As a result, it is possible to perform a thermo-active disinfection at any point, providing effective protection against legionella.
- ANROSAN’s coating material and applications have been adapted to meet the conditions and requirements of Swiss food packaging provisions following several years of research and development work.
- The Naef GROUP called on its more than 30 years of experience in water pipe renovation to develop ANROSAN.
- The Naef GROUP retains control over all ANROSAN processes – from production to technical application.
DIN Certco, specialist company
Certified process in accordance with the requirements for food packaging and in compliance with Swiss legislation
Compliance and Certificationv
ANROSAN is the first and, so far, only DIN-certified process for the renovation of drinking water pipes in buildings. In the ANROSAN declaration of conformity, Näf Tech Ltd also provides Swiss authorities with detailed information on how the system meets current testing requirements, including the legal requirements covering hygiene. ANROSAN therefore creates the best conditions for maintaining a building’s drinking water quality.
Certified and food packaging compliant
A certification programme has been devised in collaboration with accredited certification company DIN CERTCO. It is based on the Näf Tech Ltd specialist company and the ANROSAN renovation process criteria for professional renovations (although it does not cover aspects of hygiene). ANROSAN passed all tests successfully. According to the Swiss Foodstuffs Act, ANROSAN is deemed appropriate for food packaging purposes.
DIN register-number: FB1R003
Declaration of Conformity ANROSAN / Näf Tech AGNäf Tech AG has successfully passed the various legal tests required by the Swiss authorities regarding the applicable legal requirements for internal pipe renovations involving ANROSAN.
Certified and food packaging compliant
A certification programme has been devised in collaboration with accredited certification company DIN CERTCO. It is based on the Näf Tech Ltd specialist company and the ANROSAN renovation process criteria for professional renovations (although it does not cover aspects of hygiene). ANROSAN passed all tests successfully. According to the Swiss Foodstuffs Act, ANROSAN is deemed appropriate for food packaging purposes.
DIN register-number: FB1R003
Declaration of Conformity ANROSAN / Näf Tech AGNäf Tech AG has successfully passed the various legal tests required by the Swiss authorities regarding the applicable legal requirements for internal pipe renovations involving ANROSAN.
Problem with drinking water pipes
Analysis of drinking water pipes
Renovating drinking water pipes
.webp)
Let us inspire you – our testimonials
We renovate around 1,000 properties every year. For us, having satisfied customers is not enough. We want to inspire you. We strive to receive the very best customer ratings, and work hard to achieve this goal – which makes the positive feedback we regularly receive even more satisfying. Thank you very much for your trust in us and our services.
Total pipe interior renovation completed to the highest standard. The timing in January was perfect, as the impressive oil-saving effect was immediately apparent. I would highly recommend the Naef GROUP and its competent team.
Erwin Bänteli
The pipe renovation in our entire building was carried out cleanly, efficiently and neatly. We are very satisfied with the information provided and the work performed.
Martin C. Huber
After hearing the positive experiences of two colleagues, we had our 39-year-old underfloor heating renovated by the Naef GROUP – and we were not disappointed. All employees of the Naef GROUP were very professional, competent and friendly, from the preliminary assessment to the follow-up work stage. The job was completed very neatly and precisely, and finished exactly on schedule.
Ruedi Grunder
Do you have questions?
The most frequently asked questions about drinking water pipe renovation
Renovating drinking water pipes is an important decision for maintaining and increasing the value of your property. To help you get oriented quickly, we have compiled the most frequently asked questions from our customers based on real-world experience. In addition, our glossary explains the most important technical terms related to drinking water pipe renovation in a clear and understandable way.
Is there an SVGW certificate?
Does the ANROSAN coating contain substances that are harmful to health, such as bisphenol?
Will our water service be interrupted during the renovation?
For how long do your teams need access to my flat?
How does the Naef GROUP minimise the impact on residents?
What is a riser zone?
What is a tap?
How are taps counted?
What organisational matters should be clarified before the project begins?
A consultation that makes all the difference
Ein Beratungsgespräch, das den Unterschied macht
Take the opportunity to arrange a free, no-obligation conversation with one of our technical advisors. Together, we’ll analyse your current situation and show how we can renovate your underfloor heating or drinking water pipes – all without the need for replacement.
Our consultants take the time to provide personalised advice – either over the phone or on site if desired.
