IVAR Alpex - Duo XS disc 20 x 2, 83520401

Product detailed description

This PE-AL-PEX pipe is commonly used in residential and commercial buildings for hot water distribution, radiator-based heating, and underfloor heating applications. It is particularly suited for installations requiring flexibility and resistance to thermal expansion. Installers typically deal with branching circuits, manifold connections, and insulation layers in these systems. The PE-AL-PEX material ensures dimensional stability and minimal heat loss over long runs.

The disc format is ideal for workshops and large-scale installations, allowing quick access to straight pipe lengths. The 20 mm outer diameter makes it compatible with standard fittings and valves used in domestic heating and plumbing. The nominal pressure rating of PN 10 supports normal household and light commercial pressures, while the temperature limit of +95 °C suits hot water and heating systems.

Technical parameters

Material	polyethylene
Operating temperature	+95 °C
Manufacturer	Franskische
Nominal pressure	PN 10
Pipe type	PE-AL-PEX
Weight	0.141 kg
Code	83520401
Brand	IVAR

The nominal pressure of PN 10 means the pipe can handle continuous internal pressure up to 10 bar at 20 °C. This rating decreases at higher temperatures, which must be accounted for during system design. The maximum operating temperature of +95 °C is typical for domestic hot water and heating systems. The PE-AL-PEX composite structure provides good resistance to thermal cycling and mechanical stress, making it reliable for long-term use.

Installation and connection

The pipe is joined using crimping tools with TA or RA rings or press-fit fittings. The outer diameter of 20 mm aligns with standard connection sizes for valves, manifolds and radiators. Before cutting, ensure the pipe is free of kinks or bends. After cutting, clean the end thoroughly to remove any debris before fitting. Common installation errors include incorrect crimping depth, misalignment of the fitting, and failure to verify the correct size of the tooling. Always test the connections after installation and before commissioning the system.

Compatibility and accessories

This PE-AL-PEX pipe works with standard manifold systems, thermostatic valves, and underfloor heating mats. To complete the installation, crimping tools, TA or RA rings, or press-fit fittings must be sourced separately. The pipe does not require additional insulation due to its low thermal conductivity, but insulation may still be applied depending on the local code and application requirements. Compatibility with existing systems should be verified based on the manufacturer’s technical documentation.

Technical background for designers

The PE-AL-PEX construction combines three layers: an inner and outer polyethylene layer for chemical resistance and durability, and an intermediate aluminium layer for structural rigidity and thermal conductivity. This structure reduces linear expansion compared to pure plastic pipes, minimising the need for expansion joints in many installations. The pipe is designed to maintain performance in closed-loop systems and is certified for potable water use. Its integration into heating systems relies on proper jointing techniques and adherence to pressure and temperature limits to prevent premature failure.

Service and operation

Regular visual inspections for signs of wear, leaks, or discolouration are recommended. Connections should be checked for tightness and integrity, especially after periods of inactivity. There are no scheduled service intervals for the pipe itself, but maintenance of associated components such as valves and pumps should follow standard industry practices. In the event of a leak, isolate the affected section and replace the damaged pipe with a new length cut from the disc.

Frequently asked questions

Can this pipe be used with press-fit fittings?
Yes, the PE-AL-PEX pipe can be connected using press-fit fittings, provided the correct tools and technique are used according to the manufacturer's instructions.

Is this pipe suitable for potable water systems?
Yes, the PE-AL-PEX material is certified for use with drinking water, making it appropriate for domestic hot and cold water supply systems.

What is the maximum allowable working pressure at 95 °C?
The allowable pressure at 95 °C is lower than the nominal PN 10 rating. Refer to the manufacturer’s technical data sheet for exact values based on temperature-pressure curves.

How should the pipe be stored before installation?
Store the reels in a dry, cool location away from direct sunlight. Avoid stacking heavy objects on top to prevent deformation of the pipe.