Safe for closed circuits

Geberit Mapress Carbon Steel

Economical alternative
Geberit Mapress Carbon Steel is designed for installations in which economy is of the highest priority. The system is mainly used in closed water heating systems, cooling water systems, sprinkler systems, extinguishing water pipes or compressed air networks. Available in dimensions 12-108mm, including 66.7mm.

Safe processing without an open flame

Geberit Mapress prevents fire hazards at the building site, as work does not require an open flame as used during soldering or welding. Pressing indicators and defined leak paths provide additional safety that incorrectly closed connections are always detected during inspection and when the system is subjected to a leak test.

Product benefits at a glance

Geberit Mapress Carbon Steel fittings are zinc-plated and also finished with a chromatised protective layer. As with all Geberit Mapress systems, a pressing indicator shows whether the fitting was correctly pressed. Its red colour indicates the material carbon steel, and the dimension is also easily visible. More than 400 fittings are available. Corresponding adapters create fast, simple and safe connections to other Geberit systems.

Geberit Mapress Carbon Steel Solar & Industry (blue seal ring) is also available. Click here for more information about Geberit Mapress Seal Rings.

Geberit Mapress Carbon Steel fittings and pipe are available from your local BSS, Pipe Center, Plumb Center, Ashworths or William Wilson. Available in in dimensions 12-108mm, including 66.7mm.

Click here to find your local Merchant.

Geberit Mapress Carbon Steel system pipes are made of non-alloy steel (BS EN10305) to extremely high standards.There are three different types of Geberit Mapress Carbon Steel system pipe:

  • Externally galvanised
  • Internally & externally galvanised (for wet sprinkler systems)
  • Plastic coated

Geberit Mapress Carbon Steel system pipes, externally galvanised, and Geberit Mapress Carbon Steel internally and externally galvanised are non-compustible pipes.

Geberit Mapress Carbon Steel system pipes, plastic coated, are combustible pipes. The plastic coating of these pipes burns without dripping.

Geberit Mapress Carbon Steel pipes can be bent by hand up to r>5∙d and by bending tool up to r>3.5∙d.Specialist bending equipment will be required above 54mm diameter. Plastic coated pipes can be bent as above down to -10˚c.

Geberit Mapress Carbon Steel pipes must not be heated for bending.

Geberit Mapress Carbon Steel applications
Closed circuit Heating systems
Chilled water (appropriate corrosion protection required)
Compressed air systems of up to 2.5 MPa (25 bar) – approvals must be observed
Gas distribution of nitrogen, carbon dioxide & argon
Distribution of heating oil EL & Engine and Transmission Oil with a blue-coated O-ring made of fluorocaoutchouc (FKM)
Permanently installed wet fire extinguishing systems, including sprinkler systems. (Internally and externall galvanised only)
For more information on Geberit Mapress Carbon Steel applications please download our Supply Systems Installation Guide

10 good reasons for Geberit Mapress Carbon Steel


Simple connection

Permanent pressing for maximum safety

On the deburred pipe, mark the insertion depth and insert into the fitting, place the pressing jaw with the groove on the preset contour, carry out the permanent pressing operation: Faulty pressing is therefore as good as impossible.


Faster connection

Pressing instead of welding

The pressing operation is not only straightforward, but also fast – in fact, it's around twice as fast as welding. The connection requires virtually no preparatory work and the pressing sequence itself is fast and simple. Cut to length, debur, attach fitting, press – done.


No open flames

No risk of fire

The strength and tightness of the press connection is achieved by cold deformation of the pipe and fitting. In contrast to welding and soldering operations, no open flame or heat is required. Additional protection measures are unnecessary for renovation and repair work.


Fast visual check

Reliable recognition of unpressed connections

The pressing indicator on all Geberit Mapress Carbon Steel fittings already indicate unpressed connections before the pressure test. The red colour of the pressing indicator enables clear identification of the product material. The Geberit logo and the dimension are also printed on for confusion-free identification.


Protection plug

Protection against dust and dirt

All pressing sockets of Geberit metal fittings are equipped with a protection plug. It protects the supply network from dust and dirt and increases safety through perfect installation. The colour of the protection plug also identifies the application.


System pipes

Coating for corrosion protection

The plastic coating of polypropylene (PP) reliably protects carbon steel system pipes in the dimensions 12 – 54 mm against external corrosion. All carbon steel system pipes from 12 to 108 mm are also available in a zinc-plated version for individual solutions for renovations and new constructions, surface-mounted and concealed installations.


Mechanical strength for high loads

Wide range of applications

The coordinated components lend the Geberit Mapress system a very high level of strength. Operating pressures of 2.5 MPa (25 bar) and more can be achieved. Due to the high level of mechanical strength, a wide range of applications is possible which extends far beyond the usual domestic heating installations.


Spheroidisation of the seal ring

For permanent fixture and a high level of safety

During the pressing sequence, the seal ring is given a pre-defined shape by the pressing jaw of the Geberit Mapress pressing tools. During this process the ring absorbs additional energy for permanent and reliable tightness. Result: The Geberit Mapress pressing system has been working for 40 years.


Seal ring

Detecting unpressed fittings during a pressure test

The seal ring provides the pressing indicator with additional safety. Due to its special contours, unpressed connections leak during the pressure test. This prevents any subsequent damage during operation.


Homogenous structure

Thermally perfect weld seam execution

Particularly when supporting the seal ring in the inside of the fitting, the clean weld seam is key to the system's permanent tightness and to cutting susceptibility to corrosion. Weld seams have to satisfy the high Geberit quality requirements. For this reason a special thermal treatment ensures a homogeneous material structure and therefore optimum pressing.