Guidelines for VA detail models 1.0 are an industry standard from buildingSMART Norway, developed in collaboration with the Water and Wastewater Department in Oslo. The document provides common guidelines, minimum requirements, and recommended practices for modeling detailed VA objects, with a primary focus on manholes, pipes, and pipe equipment for outdoor VA facilities. The guidelines are based on open BIM standards and are derived from IFC 4.3, which has been developed for infrastructure. The purpose is to ensure that digital information is developed in a consistent and structured manner, allowing it to be used effectively throughout the entire lifecycle of a VA facility, from planning and design to construction, handover, and operation. The document describes model structure, information requirements, and geometric requirements at a detailed level, as well as defining key use cases such as interdisciplinary coordination, information control, cost estimation, construction phase, and operation and maintenance. The guidelines aim to contribute to better collaboration, higher data quality, and increased reuse of information across stakeholders, tools, and projects in the VA industry.