PP-R Pipe S5 is a polypropylene random copolymer pipe designed for internal pressurised hot and cold water distribution. The pipe is installed using thermal fusion welding, creating a homogeneous joint without mechanical couplings. The S5 classification represents a higher SDR value with thinner wall thickness compared to lower S-classes, making it suitable for moderate pressure plumbing applications. It is commonly used in residential water supply systems and building service installations.