In this paper simulation modeling of a brewery bottling line is described. Reference nets as an extended version of high level Petri nets are being used for the modeling environment and make use of external Java programming language based models. The study focuses on a bottling line used within a small-to-medium sized brewery. Machine data, flow measurements and the determination of the chemical oxygen demand from various effluent locations within the bottling line are used to build stochastic models, which are implemented into the reference net models. The resulting models are shown and a simulation experiment is compared to a real bottling process within the mentioned brewery.