The Hydro-Valve Slider is a vortex flow control device which adjusts the flow of Stormwater leaving the storage facility before entering the local storm drain or water course. In doing so it minimises potential flood risk.

It is available in a range of sizes with flow rates varying from 1 – 20 L/s* making it suitable for various specifications.  The Hydro-Valve Slider has the added benefit of an innovative and unique sliding vortex chamber feature for ease of inspection and maintenance.

*Contact JFC for larger flow rates

Additional Information

Used as part of a Stormwater management system it controls the flow from Stormwater attenuation tanks preventing downstream flooding during periods of heavy rainfall.


The JFC Hydro-Valve Sliders is manufactured to customer specifications and custom designed to achieve a specified design flow rate at a given head height.  It fits into one of the following manhole types depending on the specification:

  • 800mm Ø
  • 1000mm Ø
  • 1200mm Ø
  • 1500mm Ø
  • Flat wall
JFC Hydro-Valve Slider 20
JFC Hydro-Valve Slider 21

Features & Benefits:

  • Innovative and unique sliding vortex chamber allows for quick and easy operation from ground level should maintenance be required.
  • Lockable in open and closed positions.
  • Removes the need for a Pen-Stock
  • Design allows for direct unobstructed access to the downstream pipe
  • Typical head heights from 400 to 2500mm
  • Bespoke design for a given specification. Pre-fabricated models also available.

 * Please contact JFC for specific requirements

 Quality Assurance:

Manufactured to ISO 9001:2008 quality assurance systems


The Hydro-Valve Slider controls Stormwater flow by hydraulic effect. At low flow rates water enters through the inlet and passes through the vortex chamber to the outlet without restriction.  As the flow rate increases water enters through the inlet with sufficient energy to create a vortex in the chamber which results in a considerable pressure drop between the inlet and outlet which restricts the flow to the allowable discharge.  It therefore operates automatically with no moving parts and no external power source.

Inspection and Maintenance:

  • The Hydro-Valve slider is designed to allow direct unobstructed access to the downstream pipe.
  • The unique sliding vortex valve allows for quick and easy operation from ground level should maintenance be required.
  • Small vortex chambers can be completely removed from the manhole for inspection and maintenance.
  • The unit can be locked in both the open and closed position depending on the maintenance requirements.

JFC Hydro-Valve Slider 11
JFC Hydro Valve Slider 10

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