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Below Ground SuDS Attenuation tanks
We supply a range of underground rainwater attenuation tanks and crate systems which can be used to fulfill building control conditions related to storm attenuation. Sustainable Urban Drainage systems allow peak rainwater flows to be managed by preventing the peak storm entering the sewer system.
The benefit of using an integrated tank over crates is that the total installation time and cost is reduced since:
- a separate upstream debris filter is not required as one is integrated into the turret
- A separate flow control chamber is not required as one is integrated into the tank
- The installation of a tank is simpler and quicker than a crate install without the question mark over tank integrity and longevity
Crates offer the advantage of potentially shallow excavations and allow unique geometries to be set up to suit the site.
In order for us to quote please send through the design drawing showing the storage volume and dimensions required, upstream filtration chamber and downstream flow control.
If the design is not completed we can complete the SuDS sizing design here.

Rain Bloc Stormwater SuDS Attenuation tank system upto 27m3
£460.86
*If more than 27m3 is required please get in touch by email with the design drawing* This listing is for a ATTENUATION TANK, if a soakaway is required please check the soakaway listing here. This rainwater attenuation tank kit comprises the following: Rainbloc crates (1200x600x420mm, 95% void) (select dimensions required) 1 x 1mm Polypropyle...
5,000 litre SuDS Rainwater Attenuation Tank with integrated flow regulator

5,000 litre SuDS Rainwater Attenuation Tank with integrated flow regulator
£2,699.00
*offload is to be arranged by the customer* This below ground rainwater attenuation tank is an excellent solution for small drainage areas for which SUDS are required. Infiltration may not be possible due to due poor ground conditions (impermeable clay) or limited space. Likewise and above ground attenuation tank may not appeal due to aesthetic/...
3,000 litre SuDS Rainwater Attenuation Tank with integrated flow regulator

3,000 litre SuDS Rainwater Attenuation Tank with integrated flow regulator
£2,259.00
This below ground rainwater attenuation tank is a an excellent solution for small drainage areas for which SuDS are required. Infiltration may not be possible due to poor ground conditions (impermeable clay) or limited space. Likewise and above ground attenuation tank may not appeal due to aesthetic/planning considerations. This package provid...
1,500 litre SuDS Rainwater Attenuation Tank with integrated flow regulator

1,500 litre SuDS Rainwater Attenuation Tank with integrated flow regulator
£1,509.00
* Only central outlet is available on this tank* This below ground rainwater attenuation tank is an excellent solution for small drainage areas for which SuDS are required. Infiltration may not be possible due to poor ground conditions (impermeable clay) or limited space. Likewise an above ground attenuation tank may not appeal due to aesthetic/...

Rain Bloc Stormwater Attenuation/Soakaway Crate
£69.00
This below ground Rain Bloc crate is a simple an effective way to form a Soakaway or attenuation tank. The full Rainbloc attenuation tank kit can be found here. The crates are a single piece and can be easily maneuvered, stacked and placed. Cut outs are available for incoming pipework. The honeycomb design is extremely strong allowing vehicle ...

Graf Infiltration Tunnel Kit for Soakaways, Attenuation and Wastewaster
£269.00
The SuDS Infiltration Tunnel has been designed for the use in underground applications as a means to efficiently create a soakaway or attenuation storage. Include upstream filtration/access to allow inspection and maintenance. This kits includes everything required to complete the storage aspect of a soakaway. The following items are included...
7,500 litre SuDS Rainwater Attenuation Tank with integrated flow regulator

7,500 litre SuDS Rainwater Attenuation Tank with integrated flow regulator
£3,669.00
This below ground rainwater attenuation tank is an excellent solution for small drainage areas for which SuDS are required. Infiltration may not be possible due to poor ground conditions (impermeable clay) or limited space. Likewise and above ground attenuation tank may not appeal due to aesthetic/planning considerations. This package provides...
10,000 litre SuDS Rainwater Attenuation Tank with integrated flow regulator

10,000 litre SuDS Rainwater Attenuation Tank with integrated flow regulator
£6,019.00
*offload is to be arranged by the customer* This below ground rainwater attenuation tank is an excellent solution for small drainage areas for which SuDS are required. Infiltration may not be possible due to due poor ground conditions (impermeable clay) or limited space. Likewise an above ground attenuation tank may not appeal due to aesthetic/p...
15,000 litre SuDS Rainwater Attenuation Tank with integrated flow regulator

15,000 litre SuDS Rainwater Attenuation Tank with integrated flow regulator
£8,039.00
*offload is to be arranged by the customer* This below ground rainwater attenuation tank is a an excellent solution for small drainage areas for which SuDS are required. Infiltration may not be possible due to due poor ground conditions (impermeable clay) or limited space. Likewise and above ground attenuation tank may not appeal due to aestheti...

Rainwater Soakaway Attenuation Crate Package - EcoBloc Maxx
£549.00
This listing has moved to Rain Bloc Stormwater SuDS Soakaway tank system upto 27m3. This below ground rainwater EcoBloc Maxx attenuation crates are an excellent solution for drainage areas for which SUDS . Perfect for areas where infiltration is possible due to due good drainage conditions (sand, silt, gravel etc.). If you do not have these co...