The pipes are manufactured from PP-B block copolymer. PP pipes and fittings are currently the most commonly used solution on the internal installation market in Poland. This is due to many advantages of this system, including: resistance to high temperatures (up to 90°C) – the pipes and fittings are able to withstand long-lasting flow of hot water, thus they are used for systems where a great amount of hot sludge is discharged resistance to a vast number of chemical substances fast assembly, possible thanks to wide assortment and high quality of the components of the system durability estimated around 50 years of exploitation . An advantage of PP pipes and fittings is the high impact resistance. The perfectly smooth surface inside the pipes prevents from accumulation of deposits and sediments for many years.