Project Description


Johnny McCollum – Northern Ireland

028 7954 9045

Trevor Beddow – Great Britain

01530 240000

Michael Hassan – Republic Of Ireland

07809 553040

Gary Donnelly – Scotland

07989 348045

FP McCann’s StormBrake™ Flow Control Chamber combines an integral base and side walls with provision for inlet and outlet connections.

StormBrake™ Applications

  • As a silt-trap
  • As a valve chamber
  • Can be used as a flow rate controller (requires the installation of a vortex valve unit, sold separately).

StormBrake™ Sizes

Flow Control Chambers are available between DN1200 – DN3000. Bespoke larger units can be manufactured to client specification.

Flow rate control

FP McCann can offer supply of a StormBrake™ vortex flow control device. The StormBrake™ is designed to limit stormwater outflow to a specific discharge rate. Sizes are available between 1–80 l/s depending on head height. The unit is self-activating with no need for an external power source and comes with a certified flow rate.

The StormBrake™ is a device for controlling stormwater flow by hydraulic effect without requiring moving parts. At low flow rates, water entering through the inlet passes through the vortex chamber to the outlet with no restriction. As flow rate increases water enters through the inlet with enough energy to create a vortex in the vortex chamber which results in a considerable pressure drop between the inlet and the outlet restricting the flow to the allowable discharge. The StormBrake™, therefore, operates automatically with no moving parts and no external power source. A typical application of this valve is to control the flow from stormwater attenuation tanks preventing downstream flooding during periods of heavy rainfall.

It is custom-designed to achieve a specified design flow rate at given head height. They are manufactured under an ISO 9001 quality assurance system and are available in sizes compatible with the FP McCann StormBrake™ Flow Control Chamber range.


  • No moving parts
  • Self-activating
  • Self-cleansing
  • Manual by-pass
  • Easy installation
  • 3-6 times greater orifice CSA
  • Hydraulic data available

Please note: FP McCann advises not to complete the manhole construction until the StormBrake™ has been positioned correctly inside.