For the laboratory characterization of waste water systems EN 14366 has recently been revised such that it now provides methods to obtain input data for predictions of sound levels in buildings and not only for product comparison as in the previous version. While broad experience with the new methods is currently gained by test institutes, it is already intended to develop a second part of EN 14366 that addresses fresh water systems, potentially including water appliances such as taps and valves which are the acoustical sources in fresh water installations. So far water appliances are characterized using the methodology in EN ISO 3822 focusing solely on the classification of water appliances rather than prediction purposes. In addition, it has been shown that test results from different laboratories are often not in good agreement. This research explores the potential application of the methods in EN 14366-1 to freshwater systems including appliances, pipes, fittings, and pipe clamps.