- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 07 Dec 2020
In very general terms, a siphon is a tube that draws liquid upwards from a reservoir and then down to a lower level. Suction or emersion are initially used to draw liquid into the tube, after which flow of the liquid continues unaided.
Siphon can also be used as a verb to describe the process of siphoning.
Culvert, screen and outfall manual, (CIRIA C786) published by CIRIA in 2019, defines a siphon (or syphon) as: ‘More correctly referred to as a siphon. A particular form of culvert in which the conduit drops down to pass under an obstruction and then rises up at the other side, such that the centre part of the conduit is always full of water.’
See also: Inverted siphon.
 Related articles on Designing Buildings Wiki
Featured articles and news
Engineers pay tribute by sharing their memories.
The hidden price of infrastructure.
BREEAM incorporates wellbeing into its Building Back Better programme.
Administration signals policy changes on some building-related issues.
From inns and coaching houses to boutiques.
Survey reveals green skills gap.
America's economic collapse produced scores of PWA Moderne projects.
The benefits of glowing aggregates and cement.
Urgent need for open communication to address mental health issues.
Guidance offered on COVID-19 green recovery, building safety and more.
Providing strength and support above the joists.