Q-Brake Vortex

Controlling the release of stormwater

ACO Q-Brake Vortex is a horizontal vortex flow control designed to prevent downstream flooding by controlling the release of stormwater before it discharges into the watercourse or sewer. Available as a model in both microdrainage & causeway flow hydraulic design software it has many water authority approvals.

  • Custom built to suit the site requirements
  • Available from 2-100 l/s and up to 3m design head
  • Manufactured from grade 304 stainless steel
  • All parts welded to BS 4872
  • Available with curved or flat back
  • Attenuation volume required reduced
  • Larger clear opening, than traditional orifice plates, reduces risk of blockage

Parameters to quote

Each ACO Q-Brake Vortex and ACO Q-Chamber is individually configured to suit the specific performance criteria and the profile of the chamber.

  • ACO Q-Brake: design head (m) & flow rate (l/s)
  • ACO Q-Chamber: depth to invert / diameter of the chamber / number of pipe connections / diameters of pipe connections

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Q-Brake and Q-Chamber Datasheet
Q-Brake and Q-Chamber Datasheet

Find out more about the ACO Q-Brake Vortex flow Control and the new plastic chamber, ACO Q-Chamber, that can house it

ACO Q-Chamber

ACO Q-Chamber is a new durable bespoke prefabricated chamber designed to house ACO Q-Brake, as well as ACO Q-Plate. It combines easy-handling and simple installation with a fully-welded plastic, durable construction.

Key Benefits include:

  • Easy transportation and installation
  • Minimise working time in a confined space
  • All plastic interfaces fully welded, watertight and spark tested


  • Addresses planning and connection requirement of Floods and Water Management Act
  • Tailored performance provides optimum hydraulic efficiency
  • Reduces the need for on-site storage lowering installation costs
  • Available with a curved back for ease of installation
  • Simplifies access and maintenance
  • Removes the need for direct man access to sewer manholes
  • Proven performance and reliability
  • Approved by Severn Trent, Anglian and Scottish Water, and others
  • Simple to install


  • Regulates stormwater flows from 2-100 l/s litres per second
  • Individually configured
  • Self-activating system
  • Larger clear opening, reduces risk of blockages
  • Remote access for emergency drain down
  • Remote access bypass door
  • Inlet/outlet determined by laboratory verified curves
  • Flexible fitting options to suit profile of manhole chamber

Recommended Applications

  • Public Highways
  • Public landscaping
  • Car parking
  • HGV parking
  • Petrol station forecourts
  • Light industrial
  • Heavy industrial
  • Distribution yards
  • Airports (airside)
  • Port and dock sides
  • Security areas
  • SuDs

Not Recommended Applications

  • Threshold drainage
  • Domestic landscaping

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