ABSTRACT
ABSTRACT: The material structure of wastewater networks in Poland has been changing steadily since 1990. This paper presents actual results of changes in the period of 2000 to 2005. Effects show that the actual trend of systematic increase of PVC material applications. It pertains to both outside networks and sewer house connections. The Waterworks companies take into considerations life expectancy of pipes and sewer house connections as well as durability of joints during the process of matching the material to the sewer networks constructions.
