Main components of sewerage system are :

• Sewerage pipe -A series of underground sewer piepe connected together to form a network piping . This network piping will connect the sanitary system of the buildings to the sewerage treatment plant for conveying wastewater. 
• Sewerage manhole - A chamber to allow access to the underground sewerage pipe for serciving purpose. 
• Sewerage treatment plant / Septic tank ( small system ) - A system to treat wastewater become clean and safer before it is disposed or discharged .