Invert, Manhole

Definition

The invert of a manhole is the lowest inside surface or channel in the manhole through which wastewater or stormwater flows.

Purpose

The invert provides a smooth flow path for wastewater or stormwater within a manhole, minimizing turbulence and ensuring efficient drainage.

Examples of Use

• Constructing the invert in a new manhole to direct stormwater flow in a drainage system.
• Repairing the invert of an existing manhole to improve flow efficiency and prevent blockages.
• Designing manhole inverts to match the slope and direction of incoming and outgoing pipes.

Related Terms

• Manhole: An access point to underground utilities, typically part of a sewer or drainage system.
• Sewer System: A network of pipes that carries wastewater and stormwater away from buildings and streets.
• Stormwater Drainage: The system for managing rainwater runoff to prevent flooding and erosion.

Notes

Proper design and maintenance of the invert are essential for the effective operation of sewer and drainage systems, reducing the risk of blockages and overflow.