Non-return valve
A non-return valve (check valve or flap valve) is: ‘A one-way valve that normally allows fluid to flow through it in only one direction. In watercourses it is usually a top-hinged gate designed to close when downstream water level exceeds the upstream water level. Frequently used for drainage outfalls into tidal waters and rivers to prevent backflow.’
Ref Culvert, screen and outfall manual, (CIRIA C786) published by CIRIA in 2019.
[edit] Related articles on Designing Buildings Wiki
Featured articles and news
Civil engineers and environmental methods of construction
Can the profession use its skills to save the world from climate change?
How faulty science resulted in sanitation reform.
Conserving the Hilda Besse Building
Improving facilities, accessibility and overall appearance.
BSRIA IAQ topic guide published
Free download of TG 12/2021 available.
Electrotechincal mentors wanted
TESP works with The Youth Group to form skill sharing network.
OpenBuilt supply chain technology in development
Big tech collaborates on platform for the built environment.
Concerns raised over Future Buildings Standard
Letter signed by 21 organisations sent to MHCLG.
The infrastructure planning process
A look at the Government's strategic approach.
Steps to help reduce the spread of infection inside buildings.
Urban exploration and construction
This social media-centred hobby can be both dangerous and illegal.
Millwork wall treatment with a long and illustrious history.
Weekly workplace noise estimator tool
HSE introduces cumulative exposure calculator.
The Edwardians and their houses.
Cut off from civilian life for over 900 years.
Receive the Designing Buildings newsletter
Click the button to subscribe.