Attenuation Tanks

An attenuation tank is an underground structure designed to store and control surface water runoff, reducing the risk of flooding and ensuring compliance with drainage regulations.

We install systems such as the StormTank™ modular panel system, a versatile and robust solution widely used across the construction industry.​

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​We begin with accurate setting out and level verification to ensure the tank is installed to exact specifications.

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Precast external wall panels are installed and aligned.

The base is poured, vibrated, and finished to achieve maximum strength and durability.

Precast roof sections are installed securely.

• Experienced, qualified installation team 

• Proven track record in drainage and infrastructure 

• Fully compliant with industry standards 

• Reliable delivery with a focus on safety and quality 

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We understand that getting it right first time matters — especially when it comes to below-ground infrastructure.

StormTank systems are highly adaptable and can be designed to suit a wide range of applications, including:

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• Attenuation tanks 

• Storage tanks 

• CSO chambers 

• Pumping stations 

• Valve chambers 

• Large manholes ​​

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A blinding layer is installed to the required gradient, forming a stable base for construction.

We install bespoke reinforcement to tie the base into the walls, incorporating drainage solutions where required.

Precast internal walls are carefully positioned, bedded, and aligned.

Structural steel is fitted, followed by a final in-situ concrete pour to fully seal the structure.

If you’re planning a project that requires attenuation or drainage solutions, we’re here to help.

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📞 Contact Wallace Groundworks today to discuss

your requirements.

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