A sanitary manhole (sewer manhole,[1] sanitary sewer manhole[2] or sewer maintenance hole[3]) is a manhole that is used as an access point for maintenance and inspection of an underground sanitary sewer system. Sanitary manholes are sometimes used as vents to prevent the buildup of pressurized sewage gas.[4] Additionally, they are used for debris removal, and application of chemicals such as degreaser and insecticide.[5]
When underground sewer lines are laid close to the ground level (this may be at the depths of less than 0.75 metres (2.5 ft) or 2 metres (6.6 ft) depending on local regulations), an inspection chamber is used as an access point instead.[6][7] Inspection chambers allow access to sewer lines without requiring a person to get in them.[6]
- ^ "3". Manual on Sewerage and Sewage Treatment Systems Part A Engineering (PDF). Central Public Health & Environmental Engineering Organisation (CPHEEO). 2013. Retrieved 15 April 2023.
- ^ "Oregon Standard Drawings: Standard Sanitary Sewer Manhole" (PDF). Oregon Department of Transportation. Retrieved 14 April 2023.
- ^ "Construction Specifications and Drawings for Sewers and Watermains". City of Toronto. 17 November 2017. Retrieved 14 April 2023.
- ^ Hillhouse, Grady (2023). Engineering in plain sight : an illustrated field guide to the constructed environment. San Francisco, CA. pp. 186–188. ISBN 9781718502338. Retrieved 14 April 2023.
{{cite book}}: CS1 maint: location missing publisher (link) - ^ Parcher, Michael J. (1998). Wastewater collection system maintenance. Lancaster, PA. p. 241–243, 249. ISBN 9781566765695. Retrieved 15 April 2023.
{{cite book}}: CS1 maint: location missing publisher (link) - ^ a b South African Bureau of Standards Code of Practice for the Application of the National Building Regulations (PDF). The Council of the South African Bureau of Standards. p. 15. Retrieved 15 April 2023.
- ^ Your new sewer construction guide (PDF). Thames water. May 2021. pp. 4–5. Retrieved 15 April 2023.