Odor Control
A shallow manhole may also be known as an “inspection chamber.” It’s only 2-3 feet deep and usually has a lightweight square or rectangular cover. Shallow manholes are generally built in an area where there isn’t much traffic, such as neighborhoods. You’ll find them wherever branch pipes join the main drainage or when there is a change in the size of the pipe. It’s important to have enough shallow manholes, as they provide access for underground surveys and repairs.