PPR system is a plastic piping system of polypropylene for cold and hot tap water, underfloor and central heating, air and other applications in industries and agriculture. The quality material, PPR, or polypropylene - random copolymer, provides hygiene safety, high chemical resistance, corrosion resistance, resistance to coatings and incrustations, and extraordinarily long life with minimum reduction in the use value of the system. The low weight and easy workability guarantee a fast, simple and safe assembly. The welding concept and low roughness of the interior wall significantly reduce pressure loss in the piping, thus increasing the operating economy of the circulation systems.