Inspection Well

An inspection well (also called a cleanout or access chamber) is a vertical pipe or underground chamber installed at key points along a sewer or foundation drain system to provide access for maintenance and inspection. Inspection wells are placed at pipe junctions, direction changes, elevation transitions, and at regular intervals along long straight runs.

These access points are essential for the long-term maintainability of underground piping systems. Through an inspection well, a technician can insert a camera for pipe inspection, perform high-pressure jet cleaning, clear blockages with mechanical tools, and verify the condition of the pipes without excavation. Well-placed inspection wells dramatically reduce the cost and disruption of sewer maintenance.

Inspection well covers should remain accessible and clearly marked. A common problem occurs when landscaping, new paving, or soil buildup buries the well covers, making them difficult to locate when a blockage occurs. Keeping a site plan showing inspection well locations is highly recommended, and covers should never be permanently sealed or built over.

During routine property maintenance, inspection wells should be opened and checked annually. Look for signs of groundwater infiltration, root intrusion, or sediment buildup. If the well consistently fills with water between rainfalls, this may indicate a problem with the connected drainage system that requires professional investigation.