Removable Orifice Controls

Designers can use this graph to determine if removable orifices are suitable for the flow control of SuDS attenuation structures.
They can be removed from outside any chamber for maintenance, avoiding the need to enter a confined space allowing bypass and access to downstream pipe work.
To avoid entering the chamber to re-mount the control, the maximum depth from cover level to pipe invert should be limited to 1.20m

The Declaration of Performance for our Orifice Controls can be downloaded here.