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hydrant-system (1)
hydrant-system (1)
154 - Hydrant Install - Liverpool - 008
155 - South East Water - Hydrant Chamber - UK - Water - 004

Developed specifically for use by water companies throughout the UK and Ireland, the STAKKAbox™ Hydrant System offers an effective replacement to concrete sectional chambers. Unlike concrete, the chamber rings will not crack or break in storage or transport, preventing expensive scrapping of sections.

As part of our STAKKAbox™ range of preformed access chambers, the system is easy for one person to lift and is strong, supporting a minimum of 40 tonnes vertical loading. Each chamber section locks with the section above and below it, which provides exceptional sidewall stiffness. The STAKKAbox™ chamber can be installed in less than 20 minutes, meaning footways and roads can be re-opened quickly.

The system is ideal for hydrant valves, air valves, sluice valves, meters and wash out chambers.

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  • More robust on site 
    No breakages and therefore lost product when in use and in transit.
  • Fast and easy to install
    STAKKAbox™ chambers are significantly faster to install than conventional alternatives, with complete installations typically taking less than one hour, resulting in reduced costs for the installer. 
  • Sectional & twin wall design
    Chambers are built to required depth by adding 25mm or 75mm stackable sections. Due to the twinwall design, individual sections are light meaning that entire chambers can be manually lifted. Each access chamber possesses vertical and horizontal ribs,  resulting in a product that is strong vertically and on the sidewall. 
  • Manufactured from recycled material
    Specifying STAKKAbox™ Hydrant helps end users reach sustainability targets due to the material being largely composed of high-grade recycled material. In addition, Hydrant is completely recyclable at the end of its life.
  • Flexible during installation
    Chambers can be adapted to suit on-site conditions with standard tools
    • Overbuild over existing networks
    • Introduce duct entries for entry of pipework. 
  • Smooth outer walls with lip to ‘key in’
    Gaps in the outer wall will negatively impact the effectiveness of compaction around the chamber. STAKKAbox™ chambers have smooth outer walls and an outer lip which keys into the backfill.
  • Complete system 
    Can be supplied with D400 surface box or B125 Concrete Infill access cover.

STAKKAbox™ Hydrant is commonly used for the following applications:


  • Hydrant chambers
  • Air valve chamber
  • Sluice valves chambers etc.

The 380x230 product meets the vertical loading requirements of Annex A, BS 5834-2:2011

The 600x450 product meets the vertical loading requirements of D400 under BS EN124, in accordance with Cubis' installation guidelines.

STAKKAbox™ Modula is manufactured in talc-filled recycled Polypropylene.

Benefits of Polypropylene:

  • Excellent chemical resistance to ethanol, acetone, diesel etc.
  • Unaffected by sulfate ground conditions.
  • Recyclable
  • Low moisture absorption
  • Robust - no breakage waste
  • High strength to weight ratio
  • High stiffness to weight ratio
  • Easy to cut for duct entries

Sections can be fitted with an LDPE base in a number of options. Base sections are 25mm deep.

Available Sizes

Clear Opening Profile External
380mm x 230mm 25mm 545mm x 495mm
380mm x 230mm 75mm 545mm x 495mm
600mm x 450mm 25mm 765mm x 615mm
600mm x 450mm 75mm 765mm x 615mm