A manhole or an inspection chamber is a unit constructed underground to provide access to the utilities like a sewer system, drainage system, etc. Hence, with the help of a manhole, underground utilities are inspected, modified, cleaned and maintained.
Purpose of Manhole
The main purpose of a manhole is:
- To perform inspection, cleaning, and removal of any obstruction present in the sewage line.
- The joining of sewers, the change of direction or the alignment of sewers can be performed with the help of manhole.
- These have a perforated cover which helps the foul gases to escape. Hence it is a good means of ventilation for the underground sewage system.
- Manholes help to lay the sewer line in the conventional lengths.