The noise emitted by waste water pipes is, in most cases, generated by structure- borne sound transmission. The water flowing through the pipe causes a vibration of the pipe system that is transmitted to the installation wall through pipe clamps. Laboratory measurements and finite element simulations of a waste water pipe, excited by an electrodynamic shaker (to simplify the real excitation by water), were used to characterize it as a structure-borne sound source by its blocked force, free velocity and mobility. The characterization is carried out 1.) on the freely suspended pipe and 2.) in-situ with the pipe installed on a reception plate according to EN 15657. The overall aim of this study is to provide source data for waste water pipes that can be used for the prediction of the sound transmission in buildings using EN 12354-5 with respect to the recently revised EN 14366-1 that is currently being used for the characterization of wastewater pipes.