Roth 5 layer PEX tubing DuoPex S5 for Radiant Heating

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5 Layer PEX tubing "DuoPex S5" for
Radiant Heating Systems

Roth 5 layer PEX tubing DuoPex S5 for Radiant Heating


Energy savings
Room temperatures can be reduced by as much as 5°F (2.8 C)without sacrificing comfort. For a typical home this means you can save up to 30% on heating. When doors are closed, up to 50% of the heat will be recovered instantly. Half of the total heat is provided by radiation, which travels at the speed of light.


Cost savings
Roth systems are easy to design, and can be installed quickly. Your certified Roth system installer has ready access to world-class technical support, heating system design data and engineering.


Quiet operation, health and safety issues
Water is far denser than air so it carries much more heat. Additionally, the water runs slowly through noise-absorbing plastic tubing. Small residential circulators are so quiet they can't even be heard in the utility room. Radiant heating minimizes air movement, which reduces drafts in the home. As a result, dust, germs, viruses and mold aren't spread around the home. Allergy sufferers can breathe a sigh of relief.


Decorating freedom
The entire system is hidden, and there are no obstructions to interfere with the use of the room. There will be consistent heating throughout the entire house without any design restrictions.


Comfortable basements
What was once a damp, often chilly room can quickly be turned into a comfortable prime living area. Warm floors keep rooms dry and basement floors are now as comfortable as the floors on any other level.


Warm floors never stay wet
Water on the bathroom floor? No problem. Snow and ice in the garage? Don't worry. Roth radiant heating ensures that, if wet, your floors - and shoes, towels and clothes - will dry faster, and stay dry longer; which helps to eliminate mold, mildew and pesky, unwanted odors.


Hydronic Radiant Heating Systems: Heat that's alway's "in the zone".

Comfort control
Roth systems are designed to ensure easy control of heating in each room or zone. Thermostats for each separate heating zone give you effortless touch control to accommodate warmer bathrooms or cooler bedrooms for example. Direct sunlight, a burning fireplace, a large number of active guests many such factors can disrupt the heat distribution of a traditional system, resulting in both higher costs and temperature-related inconveniences. Roth puts an end to these and other problems with a system that provides the ultimate in control, efficiency and savings. Nothing compares to a Roth Hydronic Radiant Heating System.


Superior PEX Tubing
Roth manufactures the highest quality PEX tubing, made of crosslinked polyethylene, to guarantee unparalleled long-term performance. Two major components of the Roth hydronic radiant heating system are the proven PEX distribution tubing, and superior one-piece supply and return manifolds. Both help ensure economical, trouble-free installation of a system that will provide you with peak efficiency, ultimate comfort and long-term service.


Professional support from planning through design and installation
Roth will provide you with assistance, including heat-loss calculations, for your ultra comfort zone hydronic radiant heating system. Using leading-edge software programs, Roth's design and technical support team will guide you through every aspect of the project. Roth-trained installers will receive ongoing support throughout the installation, including easy-to-follow installation manuals.


The Roth DuoPex-c S5 for Radiant Heating Applications

This tubing has 5 layers, one EVOH layer connected to an inside and outside Pex-c layer by two adhesive layers. The main benefit of this new product is that compare to all conventional Pex-a, b, or c tubing in the market, DuoPex-c offers protection of the EVOH barrier from mechanical damages and the elements. This tubing also offers great flexibility and maximum durability due to the co-extrusion method which extrudes in-between and within the layers. This process avoids de-lamination of the delicate EVOH barrier. As with all other Roth tubing, the electron beam co-extrusion method is chemical free, always keeping the environment in mind.


This is another step that is demonstrating Roth's leadership in product innovation and value adding. DuoPex-c S5 offers more layers for added value.


5-Layer Radiant PEX-c Tubing with integral oxygen diffusion barrier

Roth 5 layer PEX tubing DuoPex S5 for Radiant Heating Cross section
Layer Description
PE-Xc Inliner
(thickness depends on dimension)
Adhesive (25 µm ± 10 µm)
EVOH Oxygen-Barrier
(50 µm ± 1 0 µm)
Adhesive (25 µm ± 10 µm)
Cover Layer PE-Xc
(80 µm ± 20 µm)



Outer diameter
Wall thickness
Load bearing
wall thickness
12,65 mm
1,92 mm
1,79 mm
15,85 mm
1,92 mm
1,79 mm
19,05 mm
2,27 mm
2,14 mm
22,25 mm
2,62 mm
2,49 mm
28,55 mm
3,22 mm
3,19 mm



  • Material Standard:
    Manufactured in accordance with ASTM F876, ASTM F877 and tested for compliance by independent third-party agencies, including NSF-rfh and ICC PMG-1025.
  • Pressure Ratings:
    Standard Grade hydrostatic design and pressure ratings as issued by the Plastics Pipe Institute (PPI), a division of the Society of the Plastics Industry, the ranges being 160 psi at 73.4°F, 100 psi at 180°F, and 80 psi at 200°F.
  • Minimum Bend Radius (Cold Bending):
    No less than six times the outside diameter.
  • EVOH:
    Tubing with an integral oxygen diffusion barrier does not exceed an oxygen diffusion rate of 0.10 grams per cubic meter per day at 104°F (40°C) water temperature in accordance with German DIN 4726/29.
  • Nominal Inside Diameter:
    With nominal inside diameter in accordance with ASTM F876.



Minimum Hydrostatic Burst Strength Requirements for PEX Tubing and Fittings

Nominal Tubing Size
Minimum Burst Pressures at Different Temperatures
psiA at 73.4°F
(MPa) at (23°C)
psiA at 180°F
(MPa) at (82.2°C)
5/8 and larger
16 and larger


A The fiber stress used to derive this test pressure is:
   at 73.4°F (23.0°C) 1900 psi (1 3.10 MPa).
   at 180°F (82.2°C) 850 psi (5.86 MPa).




Part description Part number
3/8"; Coil of 300' 2342129000
3/8"; Coil of 1,000' 2342129300
1/2" Coil of 300' 2342159000
1/2"; Coil of 600' 2342159100
1/2"; Coil of 1000' 2342159300
1/2"; Coil of 2000' 2342159301
5/8"; Coil of 450' 2342199100
5/8"; Coil of 600' 2342199101
5/8"; Coil of 1600' 2342199300
3/4"; Coil of 300' 2342229000
3/4"; Coil of 500' 2342229100
3/4"; Coil of 1,000' 2342229300


Roth has all fittings and tools available that the professional installer needs to complete the job.

Below are some of our accessories. Please refer to the Radiant Product Catalog for all of our accessories and parts.

Roth Alpha Zone Control Series for Radiant Heating Systems

Our Alpha Zone Control Series includes:

Thermostat Basic 2340077777
Thermostat Reset 2340077779
Thermostat Programmable 2340077778
6 Zone Valve Control 2340077771
Actuator Expansion Module 2340077772
Expansion Module switchable 2340077774
Pump Module with Delay 2340077775
Switching Module 2340077776
Basic Timer Module 2340077780
Module Alpha Zone 2340077773



Roth Tubing Uncoiler for Radiant Heating Systems
Tubing Uncoiler 2340095316





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WARNING: These products can expose you to chemicals such as Nickel, Lead and Styrene, which are known to the State of California to cause cancer. For more information, go to