There are several main pipes: a horizontal pipe leading to the street, a vertical pipe, and the section from one manhole to another.

Central piping may become clogged due to the age of the pipes, which reduces their capacity. Old pipes also often rust, making their replacement necessary. In addition, blockages can be caused by unwanted objects thrown into the pipes, which water cannot wash away. 

Cleaning central pipes requires a professional team and modern technology that will not damage the pipes.