GF Instaflex


Of all the available full plastic systems, polybutene is subject to the lowest rate of thermal expansion. As the expansion forces are much lower – 30 times lower than steel and 10 times lower than composite pipes. The material can absorb any expansion in itself. There is no need for expansion pieces For expansion joints. It also allows the use of commercially available fastenings and fixtures. The result:

Clean installations which are pleasing to the eye, even if space is tight.

Properties & applications

This means:

  • Space-saving installation
  • No maintenance
  • Easy installation

The high chemical resistance of the polybutene material ensures the longest possible service life of components.

INSTAFLEX is a state-of-the-art plastic piping system for applications in building technology. The INSTAFLEX system stands out with a wide range of available sizes (d16 mm to d225 mm). The same system can be used equally in a single-family detached house, in a hospital or even on board a luxury ocean liner. The pipes with diameters ranging from d16 – d25 mm are protected with an outer protection pipe. If damaged (e.g. drilling damage), individual pipes can be easily replaced without opening up the wall.

We offers the perfect connection technology for every application:

  • Electrofusion fittings for fast and safe connection on-site
  • Socket fusion as a cost-effective prefabricated alternative
  • Compression joints for connections and transitions to other materials


The INSTAFLEX system is made from polybutene – the ideal material for drinking water installations. It has been specially developed for applications in building technology.


Wide range of available sizes from 16mm to 315mm.


The main areas of application are hot and cold water, cooling systems and compressed air. The INSTAFLEX system has been designed to meet the highest demands in a variety of applications – from distribution lines to individual extraction points.

Features & benefits

Whether building a new house or remodelling an old one, this full plastic system offers a range of key advantages:

  • Cost-efficient prefabrication
  • Quick and safe handling and installation
  • Wide product range
  • Corrosion-free
  • Incrustation-free
  • Noise-insulating
  • Flexible
  • lowest rate of thermal expansion

The flexibility of polybutene allows small changes in direction without adapters. This saves additional parts and valuable time during installation on-site. Polybutene remains flexible and easy to handle even at low temperatures. Prefabricated ascending pipes can be rolled up and installed quickly and easily in the duct at the construction site

Standards & approvals

  • PB pipes and fittings are manufactured to EN ISO 15876-1,2,3, (BS 7291: Part 182 or DIN 16968/DIN 16969.)
  • Approvals/ certificates: Kitemark, Bureau Veritas (BV), WRAS, KIWA.
Schermata 2022-02-07 alle 22.06.35