Pre-insulated header pipes for Ground Source Heat Pumps


Mibec are pleased to supply RAUVITHERM Cool pre-insulated header pipes for Ground Source Heat Pumps from REHAU. Underground pre-insulated pipes are used to connect the renewable heat source to the buildings on site. The pre-insulated pipes are designed to maintain the water temperature when in transit (avoiding heat losses to improve energy efficiency). Using the cutting edge Rauvitherm production technology, REHAU have developed the RAUVITHERM Cool pipe system specifically for low temperature renewable applications such as ground source heat pumps.

It is important to insulate header pipes for ground source heat pumps to avoid transmission between flow and return in narrow trenches. This is typically required between the manifold and the building. The RAUVITHERM Cool carrier pipe is SDR 11 PE 100 pipe, made to BS EN 12201, which can be used with SDR 11 electrofusion couplers.

To improve flexibility, RAUVITHERM Cool has an optimised pipe composition to improve handling on site. The pipe is available in 40 UNO, 50 UNO and 63 UNO, the most common sizes used in ground source header pipes.


  • High quality PEX foam insulation for low heat losses
  • Insulation is bonded to the outer jacket to ensure optimum performance
  • Manufactured in the UK
  • Tight bending radius for flexibility around obstacles
  • High quality heat shrink end caps are available for making watertight underground connections
  • Robust LLD-PE outer jacket to withstand tough site conditions
  • Available in 25 or 50m long coils

At Mibec we offer a full free of charge specification service covering the whole of the UK, designed to support architects, specifiers or contractors. We can give you knowledgeable, yet impartial advice on selecting the right pre-insulated pipe solutions to meet your projects needs. Please feel free to email or call our support department on 01782 959170 (local call rate) where one of our trained advisers will be more than happy to help you.

RAUVITHERM Cool A4 Flyer.indd