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Flexalen 1000+

Multi pipe systems for multifunctional solutions
Flexalen 1000+ pre-insulated duct
Flexalen 1000+ pre-insulated duct
Flexalen 1000+ pre-insulated duct
Flexalen 1000+ pre-insulated duct

Flexalen 1000+ is our cost-effective and ultra-flexible pre-insulated multi pipe solution, ideal for combining multiple applications in a single network. Our range of Flexalen 1000+ pre-insulated ducts offers many possible combinations with polybutene (PB-1) heat transfer tubes, ensuring flexible freedom today, as well as for future adaptations.

Flexible efficiency with Flexalen 1000+

You can your combine heat and potable hot water tubes from a heat pump, wood chip boiler or solar installation as well as your frost protection and other cables in a single pre-insulated duct, then Flexalen 1000+ is the ideal choice. It combines various applications in a single, homogenous distribution network that is flexibly efficient.

One pipe to carry them all

This range of our wide Flexalen product family is highly suitable for micro-networks. A variety of pipes and other connection lines can be combined in a single solution, making it highly over-seeable. The flexibility and homogeneity of the components allow for a quick and easy installation with minimal disturbance to the existing environment.

Flexalen 1000+ pre-insulated ducts can be tailor-made to suit your specific needs. Find all the technical details in the Flexalen Product Guide in the downloads section.

  • Sustainability

    Fully recyclable

    Satisfies the requirements for sustainable construction

  • Health

    Produced without (H)CFC
    Complies to REACH
    Complies to VOC (Volatile organic components)

  • Installation

    Easy to install

    Safe welding connections due to Polybutene pipes

    Assembly on customer specification

    Full compatibility with Flexalen 600

  • Specificities

    Free moving carrier pipes

    Multi-line capability

    Homogenous connection between outer casing and insulation

  • Flexibility

    Excellent flexibility

    Bending radius 0,6 m – 1,0 m (depending on inner pipe selection)

  • Pressure rating

    Max. operating pressure 8 bar (116 PSI)

  • Additional information

    For more details contact Thermaflex or download the technical datasheet!

  • Availabilities

    4 standard medium pipe combinations:

    • OD32/OD25
    • OD40/OD25
    • OD 50/OD25
    • OD63/OD32

    Several combinations of OD16 till OD63 mm pipes possible e.g:

    • H2/32A25A20…2 times OD32 heating, OD25 potable, OD20 circulation
    • H2/50A32A25…2 times OD50 heating, OD32 potable, OD25 circulation

    Several insulation thicknesses possible, depending on inner pipes combinations: e.g. OD 125mm, OD 160mm and OD 200mm

    Up to 300 m length in coils available

    End caps for water tight sealing between outer casing and medium pipes


  Pressure drop PB-pipes PDF 44 KB Preview Download Mail

Pressure drop PB-pipes

Brochures Catalogues

  Flexalen Product Guide PDF 4623 KB Preview Download Mail

The Flexalen Product Guide offers all system, application & technical specifications for all Flexalen product ranges.

  FAQs Polybutene PDF 2492 KB Preview Download Mail

Here you will find answers according the frequently asked quastions about Polybutene.

  Successful in the past - prepared for the future (PBPSA) PDF 1619 KB Preview Download Mail

This brochure is giving an introduction to Polybutene including a review of the performance of Polybutene pressure piping systems in meeting the needs of sustainable building regulations.

  Flexalen - No1 choice for specifiers around the world PDF 817 KB Preview Download Mail

Why is Flexalen the No1 choice for specifiers around the world?

Installation Manuals

  Flexalen instruction: Laying instruction PDF 1936 KB Preview Download Mail

Laying instruction for Flexalen 600, Flexalen 1000+, Straight lenghts and Flexalen Solar.

  Flexalen instruction: Pressure testing PDF 1599 KB Preview Download Mail

Pressure testing and pressure test protocol.

Components Datasheets

  Flexalen: Flexalen 1000+ with frost protection cable PDF 503 KB Preview Download Mail

Product data sheet: Flexalen 1000+ with Frost protection cable (Type: FV+RS...-FPC...).
The multi functional system with high performance heating cable.

Technical Datasheets

  Drukverliezen PB-leidingen PDF 44 KB Preview Download Mail

Drukverliezen PB-leidingen

Safety Data Sheets

  Flexalen: Corrugated tubes PDF 133 KB Preview Download Mail

Safety data sheet: Flexalen corrugated tubes (outer casing).

  Flexalen: Foam PDF 136 KB Preview Download Mail

Material safety data sheet: Flexalen foam

  Flexalen: Polybutene PDF 45 KB Preview Download Mail

Material safety data sheet: Polybutene-1 (PB grey)


  Flexalen: Acoustic properties PDF 29 KB Preview Download Mail

Acoustic properties Polybutene.

  Flexalen: Creep resistance PDF 23 KB Preview Download Mail

Creep resistance Polybutene.

  Flexalen: Dimensions Plumbing Pipes PDF 25 KB Preview Download Mail

Dimensions plumbing pipes

  Flexalen: Expansion compensation PDF 420 KB Preview Download Mail

Expansion compensation.

  Flexalen: Fire behaviour PDF 18 KB Preview Download Mail

Fire behaviour of Polybutene.

  Flexalen: Flexural Elastic Modulus PDF 28 KB Preview Download Mail

Flexural Elastic Modulus of Polybutene.

  Flexalen: Heat conductivity PDF 40 KB Preview Download Mail

Insulation value - heat conductivity of Polybutene.

  Flexalen: Heat conductivity plastics PDF 28 KB Preview Download Mail

Heat conductivity comparision Polybutene to other plastics.

  Flexalen: Oxygen permeation resistance PDF 32 KB Preview Download Mail

Oxygen permeation resistance

  Flexalen: Temperature pressure PDF 48 KB Preview Download Mail

Temperature - pressure - resistance of Polybutene.

  Flexalen: Thermal expansion PDF 29 KB Preview Download Mail

Thermal expansion.

  Flexalen: Water hammer resistance PDF 65 KB Preview Download Mail

Water hammer resistance.

  Flexalen: Wet abrasion resistance PDF 80 KB Preview Download Mail

Wet abrasion resistance.


  Bureau Veritas Ship building approval Flexalen 1000+ PDF 793 KB Preview Download Mail

Certificate number: 21665/B0 BV. 

Type of product: Thermoplastic material pipes and fittings, Flexalen 1000+.

(July 2014).

  Ecospecifier Certificate - Flexalen 600 PDF 197 KB Preview Download Mail

Reference number: 0910276AU.

Ecospecifier Product Assessment Certificate for Flexalen 600.

(November 2010).

  KIWA certificate K8492801 welding process for plastic piping systems Flexalen 600 PDF 371 KB Preview Download Mail

This process certificate is issued by KIWA on the basis of BRL 5609 'pre-insulated flexible plastics piping systems for warm water distribution outside buildings'

Together with KIWA the welding process of electrofusion, polyfusion and butt welding is technical approved with product certificate stated requirements.

  DVGW W544 approval Flexalen PB (Group 2) PDF 434 KB Preview Download Mail

DVGW type examination certificate. 

Product Category: plastic pipes for drinking water installations (group 2).

Registration number: DW-8326CP0310 (September 2014).

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