Multilayer pipe

Selecting multilayer pipe

Multilayer pipe is suitable for flexible pipe routes in heating systems, sanitary installations and water-based systems. The pipe consists of multiple layers, often with an aluminium core between plastic layers. This allows multilayer pipe to combine flexibility with dimensional stability, making longer pipe routes practical to install without needing a fitting at every change of direction.

The right choice depends on diameter, wall thickness, insulation, length, colour coding, press system, application and mounting environment. For the broader pipe category, also review pipes for technical installations. For dimensionally stable pipework, copper pipe may be relevant. For additional protection against heat loss or condensation, pipe insulation is important.

Important when choosing multilayer pipe

• Check the correct pipe size, such as 16 x 2 mm, 20 x 2 mm, 26 x 3 mm or 32 x 3 mm
• Match diameter and wall thickness to flow rate, pressure loss and application
• Check insulation thickness, pipe colour and use for flow or return pipework
• Select press fittings that match the pipe, press profile and system
• Allow for minimum bending radius, pipe route and fixing distance
• Prevent kinks, damage to the outer layer and strain on fittings
• Always check the technical requirements of the pipe, fitting and installation

Flexible pipework with aluminium press multilayer pipe

An important advantage of multilayer pipe is flexible handling. The pipe can be routed over longer distances and is easier to shape than rigid pipe materials. This makes multilayer pipe practical for renovation, manifolds, heating pipes, sanitary connections and installations where pipes run through walls, floors, technical rooms or limited mounting spaces.

With aluminium press multilayer pipe, the combination with the correct press fitting is decisive for reliable installation. The pipe must be cut square, calibrated, deburred and inserted into the fitting to the correct insertion depth. The fitting must then be pressed using the correct press profile and suitable press tools. Incorrect preparation or the wrong press jaw can cause leakage, insufficient clamping or pipe damage.

For installers, it is sensible to determine the pipe route carefully in advance. Check bends, fixing points, insulation, colour coding, accessibility, penetrations, expansion and strain-free installation. With insulated multilayer pipe, the insulation jacket helps reduce heat loss and provides a cleaner pipe finish. Always check whether diameter, insulation, fitting and application match the installation design.