IVAR Alpex - Duo XS rod 26 x 3, 83526001

Product detailed description

This PE-AL-PEX composite pipe is commonly used in residential and commercial buildings for domestic hot water supply, central heating circuits and underfloor heating systems. It provides reliable performance in environments where thermal expansion and contraction are expected due to fluctuations in temperature. The material combination ensures flexibility and durability, making it suitable for both new constructions and renovation projects.

Installers typically handle this pipe during the early stages of system installation, where accurate cutting and preparation are essential. The pipe is supplied in 5-metre lengths, which facilitates handling and minimises waste. It is frequently integrated with manifold systems and requires careful alignment with fittings and valves to ensure leak-free connections.

Technical parameters

Installation and connection

The IVAR Alpex - Duo XS 26 x 3 is designed for use with crimp or press fittings. The installation process involves measuring, cutting, deburring and inserting the pipe into the fitting. After insertion, the fitting is secured using either a crimp ring and tool or a press tool, depending on the fitting type.

• Ensure the cut end is free of burrs and debris to prevent leaks.
• Use the correct size of fitting for the pipe OD (outer diameter).
• Follow the manufacturer’s instructions for the specific fitting type being used.
• Do not over-crimp or press the fitting, as this can damage the pipe or seal.
• Check all joints visually and, where possible, perform a pressure test after installation.

Compatibility and accessories

This PE-AL-PEX pipe is compatible with a range of fittings and valves designed for composite pipes. For secure connections, use approved crimp rings, crimp tools, or press tools. Accessories such as manifolds, valves and isolation components should be selected based on the system design and flow requirements.

When planning the installation, ensure that all required fittings and tools are available before starting the work. Compatibility between the pipe and fittings is essential to avoid leaks and ensure long-term reliability.

Technical background for designers

The PE-AL-PEX construction combines the flexibility of cross-linked polyethylene (PEX) with the structural stability of an aluminium layer. This combination reduces thermal expansion and increases dimensional stability compared to pure PEX pipes. The pipe is suitable for closed-loop heating and hot water systems where pressure and temperature fluctuations are common.

The nominal pressure rating (PN 10) allows for safe operation in most domestic and light commercial applications. Designers should account for the maximum operating temperature of +95°C when selecting components and planning system layouts. Proper insulation of exposed pipe sections helps maintain efficiency and reduce heat loss in distribution lines.

Service and operation

Regular inspection of connections and visual checks for signs of wear or leakage are recommended as part of routine maintenance. There are no specified service intervals provided by the manufacturer, but any suspected faults should be investigated promptly. Ensure that the system pressure remains within the rated limits during operation.

For long-term performance, avoid subjecting the pipe to excessive mechanical stress or sharp bends. Where the pipe runs through walls or floors, provide adequate support and protection against physical damage. In case of suspected internal blockage or reduced flow, a system flush or inspection may be necessary.

Frequently asked questions

Can the IVAR Alpex - Duo XS 26 x 3 be used for cold water supply?
No. This pipe is designed for hot water and heating systems with a maximum operating temperature of +95°C. It is not suitable for cold water applications.

What types of fittings are compatible with this pipe?
The pipe can be connected using crimp fittings with TA or RA rings, or press fittings. Always use fittings specifically designed for PE-AL-PEX pipe.

Is it possible to bend the pipe manually without special tools?
No. Manual bending is not recommended as it may cause deformation or weaken the structure. Use a pipe bender or make a series of small bends to achieve the desired shape.

How is the pipe secured when running through a wall or floor?
Use appropriate clamps or supports to secure the pipe. Avoid direct contact with sharp edges or surfaces that could cause abrasion or damage over time.