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Flow Control Chambers for Sustainable Drainage Systems SuDS

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Using our experience to design products to satisfy your needs, to make your job easier

Made in the UK

High quality sustainable water management products designed and manufactured in the UK

Technical Support

We are committed to provide full technical support in line with current legislation & guidance

The Mansfield Sustainable Flood Resilience Scheme

Severn Trent Water invested £76 million in Mansfield on a range of nature-based solutions to protect communities from flooding. Working alongside Mansfield District Council and Nottinghamshire County Council, this is the largest project of its kind ever to be attempted in the country.    

The finished scheme will be able to store over 30 million litres of surface water, that’s about 14 Olympic-sized swimming pools. In real terms this means reduced flood risk for 90,000 people and the creation of 390 jobs locally, too.   

Severn Trent Water think it will be the blueprint for how we manage flooding in the future. And at the same time, it makes Mansfield an even fresher, greener place to live for the residents and communities.  
SUDS02008 flow control chamber

Combined Flow Control
& Non-Return Valve Chamber - WASP07202

SEL were contacted by Severn Trent Water who wanted to discuss orifice flow control chambers for the rain gardens to be retrofitted for their forthcoming Mansfield Green Recovery scheme to improve flood resilience through use of sustainable drainage techniques.

The rain gardens would connect to their combined sewer so a non-return valve would also be required to prevent backflow, Severn Trent expressed a preference to use a Wastop NRV.

Normally this would mean 2 separate chambers would be required but due to serious space limitations and a need to maximise attenuation within the rain gardens, STW asked if it was possible to combine them into a single chamber. Severn Trent also wanted the orifice and NRV to be removable for maintenance

Please contact SEL if you would like further information regarding this chamber, product code WASP07202

Tel: 01254 589987 Email: sales@selenvironmental.com
Download - WASP07202 Case Study
Download - Mansfield Flood Resilience Case Study

Fit for Purpose

We developed a chamber that had a removable orifice flow control, the orifice was place on the inlet at the request of STW and a removable wastop NRV, preferred by STW.

The yellow highlights in the image show the removable elements.

The chamber was put through a testing process at Sheffield University to ensure it was fit for purpose. 18 orifice profiles were tested and the Wastop performance was checked to ensure an optimal arrangement for no effect on the flow control performance. The removable plates were also tested to see how effective their seals were.

The final design provided Compact chamber, easily handled on site with:

  • Integral shutter

  • Small footprint

  • Sealing removable plates

  • Predictable flow rate performance

  • Removable and maintainable NRV

  • Futureproof, as orifice and Wastop valve can be easily replaced or updated

CAD Details
PDF - WASP07202 DWG - WASP07202
surface water management

Key Benefits

Designed for SuDS

  • Developed by experienced SuDS designers with practicality in mind

  • Tested in situ for over a decade

  • Satisfies National Standards as well as the SuDS Manual 2015

  • Simple installation

  • Minimal maintenance over the long term

  • Standard stock items, universal formats for flexible specification or bespoke designs available

Consistent Performance

  • Low-cost flow control devices for use throughout management trains

  • Performance easily verified by local authorities

  • Straightforward specification using established criteria

  • Passive operation with consistent
    performance

  • Made to order using recyclable materials

Easy to Install

  • Easy access for inspection, measurement or sampling

  • Integral lifting points as standard

  • Depths to suit project-specific requirements

  • Supplied with integral spigot connections

  • Made from High-density Polyethylene (HDPE)

  • No concrete surround required
get in touch

Sel Environmental Ltd

Canal House, Bonsall Street, Blackburn, BB2 4DD
01254 589987 or sales@selenvironmental.com