Like everywhere else, time does not stand still for water meters. The requirements change, whether through technological progress, e.g., through the use of electronic meters, or changes in drinking water consumption. A revision of relevant normative documents is currently taking place at the international level. Against this background, various studies have been carried out in recent years and infrastructure has been built up with which the measurement behaviour of water meters can be examined more closely under real operating conditions, even at the laboratory level. This article presents the infrastructure. Furthermore, two current studies on the measurement behaviour of water meters are presented. In these studies, the effect of water quality and the effect of discrete measurements on the measurement accuracy of electronic water meters were investigated.