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The Romans used inverted siphons of lead pipes to cross valleys that were too big to construct an aqueduct. [41] [42] [43] Inverted siphons are commonly called traps for their function in preventing sewer gases from coming back out of sewers [44] and sometimes making dense objects like rings and electronic components retrievable after falling ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 3 February 2025. Type of aqueduct built in ancient Rome See also: List of aqueducts in the Roman Empire The multiple arches of the Pont du Gard in Roman Gaul (modern-day southern France). The upper tier encloses an aqueduct that carried water to Nimes in Roman times; its lower tier was expanded in the ...
Inverted siphoning occurs below the line "A". Examples of traps [ further explanation needed ] In plumbing , a trap is a U-shaped portion of pipe designed to trap liquid or gas to prevent unwanted flow; most notably sewer gases from entering buildings while allowing waste materials to pass through.
Siphon tubes are a basic implement used in irrigation to transfer water over a barrier (such as the bank of a raised irrigation canal), using the siphon principle. At the simplest they consist of a pipe with no working parts. To work they rely on the water level in the canal being at a higher level than the water level in the field being irrigated.
Siphons require priming to remove air in the bend for them to function, and most siphon spillways are designed to use water to automatically prime the siphon. One such design is the volute siphon, which employs volutes, or fins, on a funnel to form water into a vortex that draws air out of the system. The priming happens automatically when the ...
Four inverted siphon tunnels cross the particularly deep and wide river valleys of the Durèze, the Garon, [4] the Yzeron and the Trion on pipe bridges raised on high arches. In these, water filled a sunken tank tower (castellum [5]) on the brim of a slope. The tank effected a transition between open channel flow and a lead pipeline.
In 1863, work began on the construction of a modern sewerage system for the rapidly growing city of Frankfurt am Main, based on design work by William Lindley. 20 years after the system's completion, the death rate from typhoid had fallen from 80 to 10 per 100,000 inhabitants. [96] [86]: 43 [97] The sewer system of Memphis, Tennessee in 1880
Reconstruction of a 10.4 m (34 ft) high Roman Polyspastos in Germany. The ancient Romans were famous for their advanced engineering accomplishments. Technology for bringing running water into cities was developed in the east, [clarification needed] but transformed by the Romans into a technology inconceivable in Greece.