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RAUVIPEX pre-insulated pipe for district heating networks

RAUVIPEX Pipe – Pre-Insulated Pipe for Heat Networks

RAUVIPEX is a polymer pre-insulated pipe system from REHAU, designed for district heating and cooling applications. It is used for buried heat network pipework, including:

  • Connecting individual buildings, including heat pumps
  • Transporting heat within larger district heating networks

RAUVIPEX combines thermal insulation with flexibility, supporting practical installation and long-term network performance.

What Is RAUVIPEX?

RAUVIPEX is a pre-insulated pipe system from REHAU, launched in 2024 as part of their heat network product range. The system consists of PE-Xa carrier pipes, PUR insulation and a protective outer jacket, providing mechanical protection, insulation performance, and moisture resistance.

It is available as UNO and DUO pipe, in sizes from d20 to d140, supporting a wide range of heat network layouts.

RAUVIPEX System Design

RAUVIPEX has been developed for heat network applications, with a focus on thermal insulation performance and installation flexibility.
Key system features include:

  • SN8-rated outer jacket
  • Fully bonded pipe construction
  • PE-Xa carrier pipes manufactured by REHAU
  • 20-35% reduced bending force (compared to similar PU-foamed pipes)

A welded longitudinal watertightness barrier provides protection against moisture ingress, even if the outer jacket is partially damaged.

RAUVIPEX UNO and DUO pre-insulated pipe ends showing single and twin pipe configuration
RAUVIPEX UNO and DUO pipe ends showing single and twin pre-insulated pipe layouts
→ View Rauvipex Duo pre-insulated Twin Heat Main
→ View Rauvipex Uno pre-insulated single pipe

RAUVIPEX pipe is made up of four main components:

Outer Jacket
The outer jacket features U-shaped wave crests with thick walls for durability, combined with V-shaped troughs to support flexibility during installation. The jacket is SN8 rated for buried installations.

Longitudinal Watertightness Barrier
A fully welded barrier protects the insulation layer from moisture ingress if the outer jacket is damaged.

PUR Insulation
Fine-pored PUR foam provides thermal insulation while maintaining bending elasticity, supporting easier handling on site.

PE-Xa Carrier Pipes
PE-Xa carrier pipes are used for the transport of hot and cold water and are designed for long-term use in heat network systems.

Installation and Handling

The RAUVIPEX pipe structure is designed to reduce bending forces by 20–35% compared with similar PU-foamed pre-insulated pipes.
This supports:

  • Easier handling during installation
  • Reduced bending forces
  • Faster installation times
  • More compact pipe coiling

RAUVIPEX for District Heating Networks

RAUVIPEX is specified for district heating and cooling networks where the following are required:

  • Thermal insulation performance
  • Practical handling and installation on site
  • Mechanical protection in buried applications
  • Long-term system protection

RAUVIPEX is a pre-insulated pipe system for district heating and cooling networks. It combines PE-Xa carrier pipes, PUR insulation and a robust outer jacket to support installation, transport and long-term network performance.


To find out more about using REHAU RAUVIPEX heat main, call us on 01884 253 444 or email support@loco2heat.co.uk