ABSTRACT
This article presents results of the survey that involves nearly 50% of the length of networks operating in Polish cities. Analysis of the collected data had allowed determining the type of renewal technology and the scope of its application to modernize and rebuild water supply networks. Furthermore, the scope of development of water supply networks has been defined in breakdown by arterial (A) and distributive (D) pipelines as well as water supply connections. The research results achieved in the specified time had also been referred to the state of progress of the renewal of water supply networks in the previous period including about 20 years of pipelines’ operation. The research shows that renewal technologies used may be split into four groups consisting of traditional open trench replacement, trenchless replacement, reconstruction and renovation. All the technologies were applied regardless of the type of material of the old pipelines. However, the favorite technology used was traditional open trench technology.
