This is a significant milestone for the whole TAVINOX system, because TAVINOX GROOVE extends thin-wall stainless steel pipework into larger sizes and into applications where fast installation, high reliability and documented certification matter.
According to the information available to us, TAVINOX GROOVE is the first thin-wall stainless steel grooved system in Europe certified for drinking water pipework, and it uses the special TGS groove.
What ITC certification means
ITC certification confirms that the TAVINOX GROOVE grooved system meets the requirements laid down for its intended use in construction. The certificate was issued by the Institute for Testing and Certification (Institut pro testování a certifikaci, a.s.), CSI Division — the Centre for Building Engineering, acting as authorised body no. 224.
- • The product certificate is held under number 26 0151 V/AO.
- • The certificate was issued in Zlín on 12 May 2026.
- • It was issued for the construction product TAVINOX GROOVE grooved system.
This certificate matters above all to designers, installation companies, MEP (building services) engineers, wholesalers, investors and site supervisors. It provides the technical basis for the design, installation and handover of drinking water and heating pipework.
Tested to DVGW standards
The TAVINOX GROOVE system was tested at ITC to DVGW standards. DVGW is one of the most respected technical authorities for water and gas in Europe, and its standards focus in particular on hygienic suitability, material stability and the long-term reliability of a system in contact with drinking water. These are tests to DVGW standards — TAVINOX GROOVE does not hold a DVGW certificate of its own. The document for design and acceptance is ITC product certificate No. 26 0151 V/AO.
For designers and investors this is essential information: TAVINOX GROOVE is not merely a mechanical joining system for large sizes, but a stainless steel grooved system certified by ITC, with clearly documented use in drinking water and heating pipework.
The first thin-wall stainless steel grooved system of its kind
TAVINOX GROOVE brings to the market a solution that combines the benefits of thin-wall stainless steel pipework with the fast installation of grooved joining. The defining difference of the system is its own groove, TGS – TAVINOX GROOVE SYSTEM.
TGS is designed for use with thin-wall stainless steel pipework. Larger sizes can therefore be installed faster and without welding, while keeping the advantages of stainless steel in pipework where hygiene, corrosion resistance and a long service life matter. TAVINOX GROOVE thus extends the TAVINOX system into larger diameters and main runs, where speed of installation, a clean result and a certified system approach are required.
Why this matters for drinking water pipework
Drinking water pipework is one of those installations where you have to assess not only pressure, size and speed of installation, but also hygienic safety and the long-term stability of the material. For drinking water, the following matter above all:
- • the hygienic suitability of the materials used,
- • corrosion resistance,
- • the stability of the system in long-term operation,
- • the cleanliness of the inner surface of the pipe,
- • the reliability of the joints,
- • documented certification for the handover of the works.
Stainless steel suits drinking water pipework thanks to its high corrosion resistance and hygienic stability. Combined with the TAVINOX GROOVE grooved system, it provides a solution for larger sizes, where speed of installation, less welding and the demand for a long service life are the usual concerns. In drinking water pipework the operating temperature of the system is up to 80 °C; for heating and other media up to 110 °C.
Also for heating pipework
The certification also covers use in heating pipework. In heating systems the key factors are mechanical strength, material stability, leak-tight joints and the ability to install main runs quickly. TAVINOX GROOVE is particularly suitable for:
- • heating main runs,
- • service rooms,
- • plant rooms,
- • apartment buildings,
- • offices and public buildings,
- • hospitals and healthcare facilities,
- • industrial and process pipework.
Grooved joining allows fast installation without welding and without an open flame. That is especially practical in refurbishments, in existing buildings and in operating plants, where risks have to be minimised and installation time shortened.
TGS – TAVINOX GROOVE SYSTEM
TGS is TAVINOX's own grooving system, designed for thin-wall stainless steel pipework. Its main purpose is to enable safe, repeatable grooved joints in larger sizes of stainless steel pipework. TGS provides the system basis for using TAVINOX GROOVE pipes, fittings and couplings in applications that call for fast installation together with a certified technical standard.
Benefits of the TGS system:
- • a solution for thin-wall stainless steel pipework,
- • fast installation with a grooved joint,
- • no welding and no open flame,
- • suitable for larger sizes and main runs,
- • the TAVINOX system approach,
- • ITC certification for drinking water and heating pipework.
TAVINOX GROOVE certification at a glance
| Certification body | Institut pro testování a certifikaci, a.s. (Institute for Testing and Certification) |
|---|---|
| Authorised body | No. 224 |
| Certificate number | 26 0151 V/AO |
| Product | TAVINOX GROOVE grooved system |
| Date of issue | 12 May 2026 |
| Scope of use | drinking water and heating pipework |
| Groove system | TGS – TAVINOX GROOVE SYSTEM |
| Type of system | thin-wall stainless steel grooved system |
| Significance | certified system basis for design, installation and handover |
What this means for designers and installation companies
ITC certification for TAVINOX GROOVE has a practical impact across the whole process, from design to installation.
For designers
The designer gains a certified system basis for larger sizes of stainless steel drinking water and heating pipework. TAVINOX GROOVE can therefore be specified more precisely in design documentation, technical reports and bills of quantities. The system uses thin-wall stainless steel pipework and its own TGS groove technology, so main runs can be designed in a stainless steel system without switching to another material or another joining principle.
For installation companies
Installation companies gain a way to install larger sizes quickly and without welding. The grooved system shortens installation time, reduces work with an open flame and allows a cleaner installation in plant rooms. ITC certification also helps at handover — the company can produce the relevant certification documents for drinking water and heating pipework.
For investors and site supervisors
The investor and the site supervisor gain clear evidence that TAVINOX GROOVE is a certified system for its intended scope of use. That matters above all in buildings with high demands on hygiene, service life and the reliability of the installation.
Summary
TAVINOX GROOVE has received ITC certification for drinking water and heating pipework. The certificate was issued by the Institute for Testing and Certification (Institut pro testování a certifikaci, a.s.) as authorised body no. 224. In practice, the following matter most:
- ✓ the product certificate number is 26 0151 V/AO,
- ✓ the certificate was issued on 12 May 2026,
- ✓ the certification covers the TAVINOX GROOVE grooved system,
- ✓ the system is intended for drinking water and heating pipework,
- ✓ testing at ITC followed DVGW standards (the system does not hold a DVGW certificate),
- ✓ TAVINOX GROOVE uses its own groove, TGS – TAVINOX GROOVE SYSTEM,
- ✓ it is a thin-wall stainless steel grooved system,
- ✓ according to the information available to us it is the first system of this kind in Europe certified for drinking water pipework.
Frequently Asked Questions
What is TAVINOX GROOVE?
TAVINOX GROOVE is a thin-wall stainless steel grooved system for professional pipework in buildings. It uses its own groove technology, TGS – TAVINOX GROOVE SYSTEM.
What certification has TAVINOX GROOVE received?
TAVINOX GROOVE has received ITC certification for drinking water and heating pipework. The certificate was issued by the Institute for Testing and Certification (Institut pro testování a certifikaci, a.s.) as authorised body no. 224.
What is the certificate number?
The product certificate is held under number 26 0151 V/AO.
Why does the certification matter?
The certification matters to designers, installation companies, investors and site supervisors alike. It helps to demonstrate that the TAVINOX GROOVE system is certified for use in drinking water and heating pipework within its stated scope of use.
What does TGS stand for?
TGS stands for TAVINOX GROOVE SYSTEM. It is TAVINOX's own groove system, designed for thin-wall stainless steel pipework.