The Cubis Systems quick-start access chamber guide
Which STAKKAbox™ chamber suits your project?
Across every underground infrastructure project, the choice of access chamber shapes how efficiently your network can be built and maintained.
At Cubis Systems, we’ve engineered a complete range of STAKKAbox™ access chambers to replace outdated, labour-intensive, and carbon-heavy materials like brick or concrete.
From one-piece designs to fully adjustable chambers that scale to any specification, every solution in our range delivers the same key advantages:
Explore the range below with this handy at-a-glance overview.
STAKKAbox™ ULTIMA Connect
- Fully adjustable GRP chamber system comprising connectable components
- A range of cover options available from A15 to F900 loading
- Corner pieces in left and right-handed designs, enabling offset joints for a brickwork pattern that enhances sidewall strength
- Inherent variability to scale to any size and specification
STAKKAbox™ ULTIMA
- Solid ring chamber system capable of meeting F900 loadings
- Safe manual handling at >25kg per lightweight ring
- High-strength, flame-retardant, and chemical-resistant GRP construction
- Available in a range of sizes to match the most commonly used access chamber dimensions
STAKKAbox™ Modula
- Suitable for use within multiple sector applications
- Recycled, recyclable and robust polypropylene construction
- Safe for single-person lifts, with all 150mm sections weighing less than 11kg
- Size range from 150 x 150 up to 900 x 900 (mm)
STAKKAbox™ JMF
- A go-to chamber primed for telecoms / general civils projects
- HDPE mould with excellent strength to weight properties
- Frame lock-in feature and textured top for better mortar bedding
- Available in three sizes: 102, 104, and 106
STAKKAbox™ Fortess
- Robust, nitrogen-foamed HDPE design rated to D400 under EN124
- Built by combining four interlocking sidewall pieces to form a chamber ring section
- Allows for increased flexibility during transportation and installation
- Fully scalable and adaptable to varying underground utilities
STAKKAbox™ Utility
- A fully composite chamber for all utilities
- Offers standard and ducted solutions in a single, multi-purpose system
- Solid ring sections include dual knockouts for 110mm ducts, with predefined drill points for other duct sizes
- Available in 3 sizes: 450 x 450mm, 600 x 450mm, 600 x 600 mm
STAKKAbox™ RapidSTACK
- Smarter, space-saving GRP alternative to traditional concrete or brickwork
- Ideal for flat-packing and sites without large pre-installation storage spaces
- Combine a range of standard lengths to create any clear opening size required
- Delivers D400 vertical load performance with side loads comparable to concrete chambers
STAKKAbox™ Hydrant
- A lightweight but high-strength replacement for concrete chambers in the water market
- Houses hydrant valves, air and sluice valves, metres, and washout chambers
- Installed in less than 20 minutes to minimise footway and road closures
- Built with interlocking polypropylene ring sections with a 25mm or 75mm profile
STAKKAbox™ Toby
- A lightweight joint box with a compact, one-piece design
- Primed for minor access needs along rural roads
- Compact clear opening of 150mm x 150mm
- 300mm deep, built up with a 120mm ductile iron cover
MONObox™
- Structural preformed access chambers typically used for irrigation projects
- Produced in a single piece to allow for rapid, easy, and deskilled installation
- Available in two ranges: POLYvault™ and the Carson valve box
- Does not require a frame to keep the cover in place
Lighter, safer, faster, greener
The benefits all stack up with STAKKAbox™ installations.
At Cubis Systems, every chamber is designed to simplify installation, reduce manual handling, and lower embodied carbon. All without compromising performance.
Whether you’re building in urban environments or rural sites, our composite systems deliver the flexibility, safety, and sustainability needed for modern infrastructure.
