Polyethylene pipes, as well as shaped parts, distinguish high corrosion resistance and low thermal conductivity, which significantly reduces the likelihood that condensation will form on the surface of the pipes. Due to its smooth surface inside, these pipes have much more throughput than cast -iron pipes in the same diameter. It is known that polyethylene is a very good dielectric, so wandering currents do not appear in such pipes systems. In addition, polyethylene pipes are easily connected to a bell with a sealing rubber ring, and they can also be well cooked.