What is the purpose of a manhole in the collection system?

The purpose of a manhole in the collection system is primarily to provide access for inspection and maintenance of the sewer system. Manholes are strategically placed along sewage lines to allow workers to enter the sewer system safely and efficiently. They play an essential role in facilitating necessary repairs, cleaning, and assessments of the infrastructure. Regular access points are critical for ensuring that the system functions correctly and to respond to any potential blockages or failures quickly.

In the context of collections systems, the other roles that might be thought of, such as transporting wastewater, storing excess sewage, or controlling flow, are functions handled by different components of the system. Transporting wastewater relies on the sewer pipes themselves, while flow control typically involves valves or gates, not manholes. Storage of sewage may relate to overflow situations but would not be a function directly associated with manholes. Hence, the primary function remains as a critical inspection and maintenance access point.