Safe and durable

One of the most important components of a heating system is the heating pipe. For this reason, requirements are placed on heating pipes that guarantee a service life of at least 50 years with high safety reserves. The heating pipes must be oxygen-tight, corrosion-resistant and tear-resistant. The ZEWOTHERM heating pipes are tested to the highest degree and guarantee maximum safety through regular internal and external quality controls (among others by the Süddeutsche Kunststoffzentrum SKZ in Würzburg and the Gesellschaft für Konformitätsbewertung in Berlin, DIN CERTCO). Our product range comprises seven selected pipe qualities in various dimensions, which are perfectly matched to the respective applications and systems.

Heating pipe PE-Xa

The PE-Xa pipe convinces by a fast, flexible installation of surface heating systems/heating systems. The quality heating pipe is manufactured using a peroxide infrared crosslinking process and complies with DIN EN 15875/DIN EN 1264-4. The crosslinked polyethylene heating pipe PE-Xa is a three-layer pipe, 100% oxygen-tight (EVOH oxygen barrier layer) and has high pressure resistance, corrosion resistance and temperature resistance (up to 95 °C). The internal compound of the pipe prevents possible deposits. The minimal pressure loss allows the system to work even more efficiently, while the high flexibility enables fast and stress-free installation.


A.PE-Xa, B.adhesive agent, C.EVOH oxygen barrier

Heating pipe PE-Xc

Through a special extrusion process, 5 layers are processed in one operation. After complete cross-linking, the oxygen barrier layer is exactly in the middle. This pipe quality also has a special PE-Xc outer pipe, which is securely connected to the oxygen barrier via an additional adhesion promoter layer. The heating pipe is ideal for classic surface heating, but its robust design also makes it ideal for special applications (e.g. BTA) or underground installation.


A.PE-Xc, B.adhesive agent, C.EVOH oxygen barrier, B.adhesive agent, A.PE-Xc

Heating pipe PE-RT (3-layers)

The material DOWLEX 2344 is used for the production of ZEWOTHERM PE-RT heating pipes (PE-RT = Polyetylene of Raised Temperature Resistance). It is the first material specially developed for the production of pipes for underfloor heating and radiator connections. Thanks to its unique molecular structure with octene branches evenly distributed over the main chain and simultaneously narrow molecular weight distribution, cross-linking is not necessary to achieve long-term resistance under elevated temperature and pressure conditions. Nevertheless, the tube is characterized by a user-friendly, super flexible application. The high toughness and strength as well as the excellent stress crack resistance are further advantages.


A.PE-RT, B.adhesive agent, C.EVOH oxygen barrier

Heating pipe PE-RT (5-layers)

The new ZEWOTHERM PE-RT 5-layer heating pipe (short for Polyethylene Raised Temperature) is made of thermally resistant polyethylene in a five-layer composite process and is designed for use in the field of classic surface heating/cooling. The central oxygen barrier layer made of EVOH (ethylene-vinyl alcohol copolymer) is reliably protected against mechanical damage by the outer PE layer. The heating pipe corresponds to the application according to DIN 4726, is MPA-tested as well as KIWA and KOMO certified. The used material PE-RT type 1 makes the pipe extremely flexible and therefore easy to process. Due to its unique molecular structure with evenly distributed octen branches, it achieves long-term resistance under regular pressure and temperature conditions (without cross-linking).


A.PE-RT Typ 1, B.adhesive agent , C.EVOH oxygen barrier , B.coupling agent , A.PE-RT type 1

Heating pipe Polybutene

The ZEWOTHERM PB heating pipe is manufactured from the thermoplastic base material polybutene, which has been tried and tested for decades, and has proven itself in particular for the wall heating, climate flooring and ZEWO Flat thin-film systems. The pipe is provided with a barrier layer against oxygen diffusion (triple coextruded according to DIN 4726/27 and DIN EN 12319). The above-average flexibility and very good resistance to thermal and mechanical stress characterise this pipe. Further advantages are a high resistance to stress cracking and a high impact strength.


A. base pipe PB (Polybuten), B. adhesive layer, C. oxygen barrier

Metal composite pipe

Two qualities for every application: Demand for metal composite pipe installation in surface heating systems that are not connected to drinking water installations is increasing. In order to be able to offer a high-quality but also cost-optimised product, our ZEWOTHERM metal composite pipe is also available for surface heating systems. The metal composite pipe >>FBH<< is specially designed for surface heating applications. With this metal composite pipe, an aluminium jacket is butt-welded to the flexible PE-RT heating pipe. It is comparable in form and function to the DVGW-certified "Sanitär-Bruder" and ideal for the system of renovation (dry construction system) but also for all other applications.

The DVGW-tested metal composite pipe >>SANITARY<< is manufactured from polyethylene using the latest manufacturing technologies in polymer processing. It combines the advantages of a plastic pipe with those of a metal pipe, it is equally flexible and robust, extremely resistant to pressure and heat, hygienic and easy to install. The bending-resistant aluminium jacket guarantees 100% oxygen and water vapour diffusion tightness and other gaseous materials. This barrier layer protects against possible transmission of odours and corrosion, which could lead to damage to the system over time. The smooth surface also makes the inside of the pipe unassailable for normal elements present in the water. Friction points are excluded and deposits are avoided which could result in subsequent corrosion. In combination with the press connectors, this results in a reliable, certified system that covers all common installation situations: ZEWO Press.


A.Base pipe PE-RT as per DIN 16833, B.adhesive layer, C.Aluminium oxygen barrier layer pressure welded, B. adhesive layer, D.Top layer PE UV-resistant, heat-stabilized

Which heating pipe for which surface heating/cooling system

The following overview shows which heating pipe is recommended for which ZEWOTHERM panel heating system. We will be happy to advise you in detail and find the best product concept for your customers and projects.


Further information, technical data, dimensions, pipe length availability, certificates can be found in our current sales document or can be obtained on request from our technical and sales team.