Applies to PVC-C pipes and fittings, their joints and to joints with components of other plastics and non-plastics materials intended to be used for the following purposes: a) soil and waste discharge pipework for the conveyance of domestic waste waters (low and high temperature); b) ventilation pipework associated with a); c) rainwater pipework within the building structure. It applies to pipes and fittings marked with "B", which are intended to be used inside buildings and outside buildings fixed onto the wall, and marked with "BD", which are intended to be used for both inside buildings and buried in ground within the building structure.