Floor drains are either wastewater drains or groundwater drains. Wastewater drains bring the water into pipes that connect to the home's sewage system. Groundwater drains channel the water to pipes that bring the water outside of the house, often by way of a sump pump. For more details download the CAD file from our cadbull site. This can be used by architects and engineers. Download this 2d AutoCAD drawing file.