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Safe transport over longer distances

Local and district heating networks as well as cooling networks are becoming increasingly important. The advantages are obvious: a central system supplies several buildings, even entire cities or conurbations, with heat for heating and hot water or cold for air conditioning via underground pipelines. Compared to district heating/cooling, local heating/cooling involves the transport of water over relatively short distances, which means that the systems have lower losses and lower temperatures. The investment costs are usually significantly lower than the costs for building services that would be required for each individual building. In addition, the central system works extremely efficiently. However, the right choice of piping system is crucial.

With aquatherm ti you get a pre-insulated pipe system for underground installation, which is ideally suited to transport heating and cooling water safely and efficiently over longer distances. The medium pipe aquatherm blue pipe or aquatherm green pipe is insulated with PUR-hard foam and enclosed by a jacket pipe made of PE to protect it against damages by the surrounding soil. Only fibre composite pipes are used as carrier pipes, which are ideal for underground installation due to their low linear expansion.

All aquatherm pipes are made of the corrosion resistant material fusiolen® PP-R/ PP-RP, which is characterized by a very good weldability and a high intrinsic insulation value. The low weight facilitates installation on site.

Product advantages

aquatherm TI


  • low linear expansion
  • impermeable
  • corrosion resistant
  • very good welding properties
  • high impact resistance
  • low weight
  • self-compensating
  • high intrinsic insulation value


aquatherm pipes and fitting are connected by heat fusion. In the process, the plastic fuses into a homogeneous, cohesive unit. Double material thickness at the connection point – this means double safety at the otherwise critical point of a piping system. With the fusion technique of aquatherm you quickly create a permanently tight connection!

Depending on the dimensions of the pipe, the heating element socket welding process (32 to 125 mm), the butt welding process (160 to 355 mm) or the electrofusion process (32 to 250 mm) are used. The pipe ends of the carrier pipes are uninsulated over a length of 250 mm in order to be able to make a professional and proper connection. For insulation of all joints aquatherm TI joint sets are used, consisting of four dimension-related PUR rigid foam elements and a shrink joint tested and approved for underground installation.