This Architectural Drawing is AutoCAD 2d drawing of Side section of a bathroom in AutoCAD, Dwg file. This hole is known as the siphon jet. It releases most of the water directly into the siphon tube. Because all of the water in the bowl enters the tank in about three seconds, it is enough to fill and activate the siphon effect, and all of the water and waste in the bowl is sucked out. For more details and information download the drawing file.
