Manhole
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A manhole, also called utility hole, maintenance hole, or sewer hole, is an opening to a confined space such as a shaft, utility vault, or large vessel. Manholes, typically protected by a manhole cove
PMG manholes in a city street, Perth, Western Australia
Manhole being used to access sewer
Installation of a fiber-optic manhole in Brooklyn, New York
An uncovered manhole in Beirut, Lebanon
Sanitary sewer
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A sanitary sewer is an underground pipe or tunnel system for transporting sewage from houses and commercial buildings to a sewage treatment plant or disposal.
Manhole
…underground public utility, allowing inspection, maintenance, and system upgrades. The majority of underground services have manholes, including water, sewers, telephone, electricity, storm drains, district heating, and gas. Manholes are generally found in urban areas, in streets and occasionally under…
Sanitary sewer installation with PVC pipe. Sanitary sewers are sized to carry the amount of sewage generated by the collection area. These sewers are much smaller than combined sewers, which are designed to also carry surface runoff.
Schematic of a conventional sanitary sewer to convey blackwater and greywater from households to a centralized sewage treatment facility.
A manhole cover for a sanitary sewer access point.