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Product profile | Q-Bic Plus


Wavin’s Q-Bic Plus range of sustainable drainage products offers design and installation benefits and come with on site assistance.

Geocellular modular plastic units have been used for stormwater management throughout Europe since the 1980s. The units are used to form underground structures which manage stormwater, either allowing it to infiltrate back into the surrounding ground, or by attenuating it and then releasing a controlled rate into the existing drainage network.

Wavin has a history of leading innovations that have raised the bar in the design and production of such systems. It says its Q-Bic Plus range represents the next generation of stormwater management solutions.

Wavin’s technical team used its 20 years of experience, alongside customer feedback and research, to design Q-Bic Plus.  

The range offers an improved method of storing surface water, providing significantly enhanced design freedom, speed of installation and access for inspection, cleaning and maintenance.

It can be used to create an attenuation tank or soakaway in a wide range of trafficked or landscaped applications. The Q-Bic range can also be used as part of a sustainable urban drainage scheme to help reduce flood risk.

Access and maintenance

Wavins says that Q-Bic Plus high storage volumes set new standards in coping with peaks in rainfall and offering tank accessibility.

The design of the units features 70% open floor space and provides strength to support vertical loads.

Each pre-assembled column unit has a top layer with six supporting columns that have a “four-in-one’ design for extra strength and stability.

Additionally, with no internal walls, the system offers 96% storage capacity for stormwater throughout the product’s lifespan.

Lateral and vertical access for inspection and cleaning equipment is intended to make maintenance easy. The design incorporates wide access and bi-directional guide channels of up to 370mm to allow for smooth and unobstructed access of CCTV and cleaning nozzles.

This reduces the number of vertical access points required. Lateral chamfers keep CCTV cameras on track and the open structure allows for a 360°picture of the open structure during inspection.

Flexible tank design

As a modular system, Q-Bic Plus enables configuration for different shapes, tank orientations and layouts. A variety of connection options also ensure effective attenuation or infiltration whatever the site conditions. A choice of base plates is available with a solid base plate for attenuation and a perforated base plate for infiltration.

Safe and efficient installation

Q-Bic Plus is also designed with safety and ease of installation in mind, and offers a number of unique ergonomic design features.

The lightweight, nestable crates come with hand grips and rounded edges and can create a level, walkable surface at each level of installation, with no trip hazards or protruding vertical connectors.



Q-Bic Plus installation at Norfolk County Council’s Mundford roundabout project with Tarmac

Integrated, patented connectors automatically slide into one another for quick and easy installation, negating the need for specialist equipment and tricky small parts.

Ready for Sewers for Adoption 8

Q-Bic Plus products are also designed with the “Sewers for Adoption 8 (SfA8)” guidelines in mind as these are expected to be implemented later this year.

SfA8 will, for the first time, include formalised standards for sustainable drainage systems to be adopted by water companies, with a particular focus on installation, health and safety, maintenance and access.

The modular system is also fully building information modelling enabled, allowing for the design to be fully integrated into the overall project. It is also British Board of Agrément certified.

 Q-Bic Plus in action

When developing a new four-arm roundabout to open up new land for development, Norfolk County Council was unable to feed the rainwater runoff into the existing local sewer system.

Instead, the council and project contractor, Tarmac, turned to Q-Bic Plus to provide a water attenuation system that would be simple to install and easy to maintain.

The project had to meet stringent regulatory requirements from the lead local flood authority and the Environmental Agency. This included ensuring the system was designed to cope with a 1 in 100-year storm event, while offering an additional 40% allowance for climate change. The site was also within an Environment Agency Source Protection Zone 3, so the proposed drainage system had to be fully inspectable.

Norfolk County Council community and environmental services engineer Ting Liu, designed a water attenuation system featuring Q-Bic Plus. Once developed, Liu asked Wavin’s technical team to check and confirm the designs.

Liu explains: “There are many stormwater attenuation systems on the market, but not many can be inspected. We opted to use Wavin’s Q-Bic Plus system due to its storage and infiltration capabilities, alongside its easy accessibility for inspection.”

Once the designs were finalised, Wavin worked closely with Tarmac to ensure the project ran smoothly providing on-site training on the simple installation process for all team members.

 Tarmac gang foreman Sean Rasberry said: “When we initially received the delivery of Wavin’s Q-Bic Plus on site we were a little apprehensive.

“It was a big delivery and not something we’ve worked with before, but the flexibility and ease of installation of the product was great.

“We’ve even managed to save a few days on the installation process to get the project finished ahead of schedule.”

Installation of the Q-Bic Plus crates finished in late November, and the full project is expected to be completed and handed to NCC ahead of Christmas.


Produced in association with Wavin


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