The subject of the project is the replacement of existing high-loss steam lines with new hot water pipes in the pre-insulated design. As a result, losses will be reduced by approximately 2/3 from the original value. The project consists of (a) the replacement of the backbone pipe between TTA1a high-end anchor TTA2, (b) replacement of the fault pipe between TTA1 and VS26, (c) construction of a hot-water connection for the objects of the Ministry of Defence of the Czech Republic, (d) modifications of the exchanger station VS1 and transfer stations, (e) installation of optical interconnections.