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Warmup pex-a pipe

PEX-A Pipe

The Warmup PEX-A Pipe is formed as a single extrusion with an adhesive layer and EVOH oxygen barrier.

Key benefits


Oxygen barrier

Encasing the PE-Xa completely, the adhesive layer prevents oxygen entering the system via the pipework.


Easy to lay

Flexible and light, the pipe is easy to lay down.


Corrosion free

The coatings stop oxygen from entering via the pipework minimising the risk of corrosion to the system.

Nexxa panel hydronic underfloor heating

Recommended Pipe for Hydronic Systems

The oxygen barrier is required to prevent ingress of oxygen which will fuel corrosion within the system. The PEX-a pipe is able to withstand higher pressures, is more kink resistant and considerably more flexible than competing Pex-pipes. This means an easier installation for the installer.

The oxygen diffusion barrier encases PEX-a completely, preventing the entry of oxygen into the heating system via the pipe work. The tough outer layer is designed to withstand the rigours of surrounding workloads, ensuring that the oxygen barrier remains intact. This significantly reduces the risk of corrosion within the entire system.

PEX-a pipe is what we recommend at the heart of all our underfloor heating systems because it is strong, flexible, kink resistant and comes with our best warranties, guaranteed.



Lifetime Warranty

The Warmup PEX-A Pipe is formed as a single extrusion with an adhesive layer and EVOH oxygen barrier.

Technical Information

Product Documentation
Technical Specifications
Pipe Range nominal dimensions 16mm OD 2.0mm wall thickness
Colour Natural
Coil sizes 16 x 2mm – 240m, 500m
Maximum Temperature Peak 95 oC
Maximum Operating pressure 6.0 bar
Construction 5 layer: PE-RT – Adhesive – Oxygen Barrier (EVOH) – Adhesive – PE-RT
Manufacturing EN ISO 22391

Mechanical Properties
Composition PEX-A 70% cross linked
Pipe roughness 0.007 mm/m
Bending radius 5 x outside diameter minimum
Water capacity 16mm – 0.113 l/m
Oxygen permeability < 0.32 mg O2/ (M2. d)

Thermal Properties
Thermal conductivity  0.41 W/m K

Installing this product? You will also need:

hydronic underfloor heating manifold


Our Manifold is manufactured from stainless steel and provides water regulation for up to 12 underfloor heating circuits.

hydronic underfloor heating control centre

Control Center

All hydronic systems require a control centre that works with the thermostats and heat source, such as a boiler or heat pump.

3ie energy monitoring thermostat


Choosing the correct control system is crucial in ensuring that your heating system works in the most efficient way.

Get A Quote

Get a Free Quote and Order Online Today

Use our online quoting tool to find the best hydro underfloor heating system for your project and purchase it directly from Warmup.

Quoting Tools: instant, accurate, flexible

Warmup offers an extensive range of electric and water floor systems compatible with all floor types, rooms and projects.

Electric Systems

  • ✓ Ideal for zones less than 25m²
  • ✓ Ideal for single rooms
  • ✓ Does not alter floor levels
  • ✓ Great for renovations

Electric Systems Quote
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Water Systems

  • ✓ Ideal for larger zones over 25m²
  • ✓ Rapid auto heat loss calculations
  • ✓ Compatible with existing central heating systems
  • ✓ Great for new-builds

Water Systems Quote & Buy
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For areas of 24m2 or more, use our full quoting system
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