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
Northern Ireland infrastructure advisory board
Country moves one step closer to creating independent body.
Heat pump projections for the next decade
BSRIA examines factors driving the industry.
Ensuring designs are developed, validated and can be effectively implemented.
The Homebuyer Survey most suitable for newer homes or simple properties.
Health and safety practices for body and mind.
Planning in a post-COVID world
28 leading bodies set out their vision for the future.
Updates to Job Support and Self-Employed Grant Schemes
Chancellor announces latest Winter Support packages.
Tapping technology to boost infrastructure and create jobs.
4 ways to ensure certificates are valid.
White elephant construction projects.
How Paul Williams bent over backwards to overcome racial barriers.
CLC SOP recommendations updated
Organisation revises actions around dealing with COVID-19.
CIOB, NFCC, RIBA, RICS call for changes ahead of Building Safety Bill.
Options for carbon neutral homes
Developments in the Future Homes Standard.