Plumbing shop drawings are a type of technical drawing used by plumbing professionals to create a schematic of the plumbing in a building. This type of drawing is extremely important in the planning and construction phases of a building, as it can help identify potential problems and ensure that the plumbing is installed correctly. Plumbing shop drawings typically show the location of all pipes and fixtures in a building, as well as the type and size of each pipe. They may also include notes on special requirements or restrictions, such as the need to avoid certain areas or the maximum allowable height of a pipe. Plumbing shop drawings can be created by hand or using computer-aided design (CAD) software.