Through advances in software technology, the integration of geographic information systems (GIS) and hydraulic computer models is becoming more common. Much of the information and data needed for a hydraulic model is typically included in a GIS. Thus, when utilized properly, the information and data from a GIS can be used to efficiently and effectively develop a hydraulic model of a water distribution system. Additionally, the integration of a GIS and model allows for the transfer of results from the model to the GIS and facilitates future model updates. Due to inherent differences between the objectives of a modeler and a GIS analyst, the integration of a model and a GIS is not always an efficient process. If these differences are not addressed, the benefits of integration can be outweighed by the inefficiencies. Thus, as the need and desire to integrate GIS and models becomes more common, it will be essential for modelers and GIS analysts to bridge the gap in their differences in order to fully utilize the benefits of integration. Techniques and tips for overcoming the differences in objectives between modelers and GIS analysts to promote successful integration of GIS and models are presented. The paper draws upon actual project experiences and discusses specific techniques used and lessons learned in the development of water distribution system models from GIS and subsequent integration of the two tools. The techniques and experiences presented in this paper are intended to identify issues that modelers and GIS analysts should consider when planning to integrate a model and a GIS and provide a set of guidelines to overcome potential pitfalls. Includes 2 references, figures.