PEX AL PEX Pipe – 20mm, 25mm & 32mm Multilayer Composite Pipe
PEX AL PEX pipe delivers high performance for modern heating and plumbing systems. It combines cross-linked polyethylene with a welded aluminium core to provide strength, flexibility and long-term stability.
The aluminium layer forms a built-in oxygen barrier that protects boilers and metal components from corrosion. At the same time, the pipe holds its shape after bending, which makes installation faster and more precise.
We supply this composite heating pipe in 20mm, 25mm and 32mm diameters, giving you the flexibility to match your system requirements.
What Is PEX AL PEX Pipe and How Does Multilayer Composite Pipe Work?
Manufacturers bond five layers together to create PEX AL PEX pipe. Cross-linked polyethylene forms the inner and outer layers, while a precision-welded aluminium core sits at the centre.
This construction combines plastic flexibility with metal stability. Unlike single-layer plastic systems, this aluminium core pipe does not spring back excessively after bending. Therefore, installers achieve cleaner pipe runs with fewer supports.
The aluminium layer also reduces thermal expansion significantly, which helps maintain consistent performance during temperature changes.
PEX AL PEX Pipe Sizes Available – 20mm, 25mm & 32mm Options
Choosing the correct diameter ensures efficient flow and heating performance.
20mm PEX Aluminium Pipe for Heating Distribution
Installers often choose 20mm pipe for smaller heating circuits and secondary distribution lines. It provides reliable flow capacity while remaining easy to handle.
25mm Multilayer Composite Pipe for Larger Zones
25mm multilayer composite pipe supports higher flow rates. Consequently, it performs well in larger heating zones and radiator branches.
32mm MLCP Pipe for Primary Flow and Return
Engineers install 32mm MLCP pipe on primary flow and return lines. Because it carries greater water volumes, it suits higher-demand systems.
Each diameter maintains the same multilayer construction and integrated oxygen barrier.
Benefits of PEX AL PEX Multilayer Composite Pipe
This multilayer composite pipe offers several advantages over copper and standard plastic systems.
First, the aluminium core limits expansion. As a result, movement and pipe noise decrease.
Second, the smooth internal bore improves water flow, which supports efficient heating performance.
In addition, the composite structure resists corrosion and prevents scale build-up. Therefore, the system maintains long-term reliability.
Finally, the material remains lightweight while delivering structural strength. This balance helps installers complete projects more efficiently.
Applications for Aluminium Core Heating Pipe
PEX AL PEX pipe performs reliably across many heating and plumbing installations.
Installers connect boilers, radiators and distribution lines in central heating systems using this composite pipe. Its temperature resistance supports demanding operating conditions.
For underfloor heating distribution, contractors often use 20mm, 25mm and 32mm pipe to supply manifolds. These sizes maintain stable circulation throughout the system.
Plumbers also use multilayer composite pipe for hot and cold potable water services because it resists corrosion and supports clean water flow.
Installing PEX AL PEX Pipe with MLCP Fittings
Proper installation ensures optimal performance.
Always use fittings designed specifically for multilayer composite pipe. Press and compression fittings create secure, reliable connections.
Cut the pipe cleanly using a proper cutter. Then calibrate and chamfer the pipe end before inserting the fitting. This preparation protects sealing surfaces and improves joint integrity.
Because PEX AL PEX pipe retains its shape after bending, installers form controlled curves without excessive clips. However, follow recommended support spacing guidelines.
Finally, pressure test the system thoroughly before commissioning.