Second floor drainage plan of a commercial building.

This is a Architectural Drawing is a drainage plan for second floor of a commercial building. This is a 5 story building. All the joints off waste pipes should be air-tight. b) Each waste pipe should be connected to common stack directly. c) Vent pipe diameter should not be less than 50 mm. d) The waste pipe should join the stack, above the soil branch at each floor. For more knowledge and information download the drawing file.