The proper slope of the sewer should be such that the sewage flows smoothly from the starting point to the ending point. If the slope is too high, problems may arise which include:
1. Increased flow velocity: A steep slope of the sewer may increase the flow velocity, which can lead to friction and damage to the pipes and related equipment.
2. Occurrence of problems caused by the return flow: If the slope is too high, it may cause problems such as the return flow of sewage, which can lead to pollution and the spread of odors and harmful bacteria in the environment.
3 Defects and defects in the structure: Excessive slope of the sewer may cause pressure caused by water flow in the walls of the building, which can lead to damage and defects in the structure.
In general, a suitable slope should be used for the sewer so that these problems do not occur.