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Sanitary Manhole
A sanitary manhole (sewer manhole, sanitary sewer manhole or sewer maintenance hole) 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. Additionally, they are used for debris removal, and application of chemicals such as degreaser and insecticide. When underground sewer lines are laid close to the ground level (this may be at the depths of less than or depending on local regulations), an inspection chamber is used as an access point instead. Inspection chambers allow access to sewer lines without requiring a person to get in them. Locations Sanitary manholes should be constructed at locations where there is a change from a simple straight sewer line. These include all junctions that combine multiple lines into one or split from one, bends, changing in elevation, changing in pipe size, and changing in pipe type. For st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manhole
A manhole (utility hole, maintenance hole, or sewer hole) is an opening to a confined space such as a shaft (civil engineering), shaft, utility vault, or large container, vessel. Manholes, typically protected by a manhole cover, are often used as an access point for an underground public utility, allowing inspection, maintenance, and system upgrades. The majority of underground services have manholes, including Water industry, water, sanitary sewer, sewers, telephone, electricity, storm drains, district heating, and natural gas, gas. Manholes are generally found in urban areas, in streets and occasionally under sidewalks. In rural and undeveloped areas, services such as telephone and electricity are usually carried on utility poles or even Electricity pylon, pylons rather than underground. In Australia, ''manhole'' also commonly refers to an access hatch used to get access from a room or hallway into the ceiling cavity of a building. These manholes are typically around square ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
