A drain is a pipe that serves only one building as a means of conveying water and waste water away to a sewer

In-house drainage system pipes may be designated depending upon the function as shown below. Soil Pipe: A pipe carrying human Sewage from W.C. Waste Pipe: A pipe carrying sullage. Vent Pipe: It is a pipe installed to provide a flow of air to or from the drainage system or to provide circulation of air in the drainage system to protect the water seal of traps against Siphonage and backflow. Antisiphonage Pipe: It is the pipe that is installed to preserve the water seal in the trap through proper ventilation Rainwater Pipe: A pipe carrying only rainwater. Soil pipe: 100mm Waste pipe: horizontal: 30-50mm Waste pipe: vertical: 75mm Rainwater pipe: 75mm Vent pipe: 50mm Pipe Sizes: Vent Pipe Waste Pipe Rain Water Pipe Antisiphonage Pipe Soil Pipe