inverted siphon

[in′vərd·əd ′sī·fən]

(civil engineering)

A pressure pipeline crossing a depression or passing under a highway; sometimes called a sag line from its U-shape.

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Inverted Siphon

a pressured water conduit laid under the bed of a river or channel, along the sides and bottom of a deep valley or ravine, or under roads to pass an intersecting current of water (channel). Inverted siphons are placed in water-supply, sewage, and irrigation systems and in hydroelectric power installations. A distinction is made between single-hole inverted siphons, which consist of a single pipe, and multihole types, with a round or rectilinear cross section. Inverted siphons are made of reinforced concrete (most commonly), wood, and steel.

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References in periodicals archive

At the Los Coyotes project, the Insitutube conformed to the horizontal curves and the inverted siphon with relative ease.

Districts expand sewer rehabilitation program

For example, the existing collection system includes four newly installed inverted siphons, which are located under the river and play an important role in conveying west side flows to the east side where the sewage treatment plant is located.

Tunnel project helps stem CSO pollution

The Highlands Canal System, where work was recently completed at two separate inverted siphon locations, is made up of approximately 900 acres of land, 38 miles of canals, a 500 acre reservoir and a 100 million gallon per day (mgd) pump station on Lake Houston.

Underwater Sliplining

The BFID also has several inverted siphons (that is, a pipe for transporting water through a low spot, resembling the P-trap under your kitchen sink) to help transfer water across the natural drainage valleys, which lie perpendicular to the canals.

The Belle Fourche Innovation District

Wood stave flume trestles were replaced with inverted siphons. The large inverted siphons are used to convey water being carried in canals or flumes across valleys for irrigation.

Irrigation district tackles major system update

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