The article says about the main requirements of the Regional Methodical Document “Designing and installation pipelines for water supply and sewage systems in Saint-Petersburg” (RMD 40-20-2013 St. Petersburg). This document is a modern practical guide to the design and construction (and reconstruction) of water supply and sanitation in the territory of St. Petersburg. This document recommends for St. Petersburg the materials of water and sewage pipeline such as PE 100-RC (with a significantly enhanced resistance to slow crack growth –stress cracking resistance) and ductile iron. These pipes are used for alternative pipe installation methods. Their service life can be up to 100 years.