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December 7, 2023

Revolutionising Infrastructure: 3D-Printed Drawpits Enhance Efficiency at Esholt Sewage Works

Revolutionising Infrastructure: 3D-Printed Drawpits Enhance Efficiency at Esholt Sewage Works


Yorkshire Water's Esholt sewage works near Bradford has embraced innovation with the installation of a groundbreaking 3D-printed concrete structure. Developed by Finland's Hyperion Robotics in collaboration with materials supplier Tarmac and engineering company Mott MacDonald Bentley, this transformative project introduces a new era in sewage infrastructure.

The 3D Printing Marvel

Hyperion Robotics, known for its expertise in cutting-edge 3D printing technology, worked in tandem with Tarmac and Mott MacDonald Bentley to create four 3D-printed versions of a drawpit specifically designed for Esholt wastewater treatment works. Traditionally, drawpits, crucial for redirecting electronic cabling, were large 5.2-meter square concrete structures. The new 3D-printed drawpit, however, defies convention with its 2.2-meter diameter circular design made from reinforced concrete. Comprising two faces serving as formwork and encapsulating a traditional reinforced cast concrete core, this five-tonne marvel is a compact and efficient alternative, being only half the size of its traditional counterpart.

Efficiency in Construction

The groundbreaking aspect of this project extends beyond its design; each drawpit took a mere two hours to 3D print, with the addition of pipes and reinforcement during the process. After printing, the structures underwent a curing process before being cast with self-compacting concrete. Once completed, these innovative drawpits were transported from Finland to Esholt, ready to enhance the sewage works' functionality.

Advantages Over Traditional Structures

The switch to 3D printing technology for constructing drawpits brings a multitude of advantages. The circular design, a departure from the conventional square structures, optimises space and allows for a more efficient use of resources. Weighing in at half the size of traditional drawpits, these 3D-printed structures showcase a substantial reduction in both material usage and environmental impact. The rapid printing process not only accelerates construction timelines but also introduces a level of precision that is challenging to achieve with traditional methods.


The installation of 3D-printed drawpits at Esholt sewage works marks a significant milestone in the integration of advanced construction technologies within the wastewater treatment sector. The collaboration between Hyperion Robotics, Tarmac, and Mott MacDonald Bentley demonstrates the potential for innovative solutions to enhance efficiency and sustainability in infrastructure projects. As 3D printing continues to revolutionise traditional construction practices, the Esholt project stands as a testament to the industry's commitment to embracing cutting-edge technologies for a more sustainable and streamlined future.

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