Make sure you have a high-performing drainage solution for your property with the Graf infiltration tunnel. Combine it with your soakaway and attenuation to create a tunnel with a permanent load level of up to 59kN/sqm. Ideal for lorry-bearing. Suited to private or rural area... Read More
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Make sure you have a high-performing drainage solution for your property with the Graf infiltration tunnel. Combine it with your soakaway and attenuation to create a tunnel with a permanent load level of up to 59kN/sqm. Ideal for lorry-bearing.
Suited to private or rural areas, the system consists of one or several tunnel modules with two end plates to extend as needed. The laying is realised in one or more lines at the same level.
The weight of a single module is 11 kilos to ensure handling is much more efficient.
Please note:
Question:
The photo here on your website shows the end plates included, but I note on the Graf website, the same product ID does not include the end plates. Can you confirm if these are included?
Answer:
I'm sorry for any confusion caused by the product images. For the Graf Infiltration Tunnel for Soakaways and Attenuation, the end plates are not included. They need to be purchased separately. I hope this helps to clarify, and please let us know if you have any other questions!
Question:
would these be suitable 3mtrs below ground on chalk bed rock ?
Answer:
The Graf Infiltration Tunnel is designed for use in various ground conditions and can be placed at different depths. However, for specific cases such as placement 3 meters below ground on chalk bedrock, the suitability would depend on factors like soil stability, water flow, and load above the installation. Unfortunately, we don't have specific information on using the tunnel in these conditions. For more detailed technical information about the product, you may want to consult the Technical Information document which might provide some guidance. Here's the link: Graf Infiltration Tunnel Data Sheet. Another option is to consult with a local engineer or the Graf technical team to ensure the product meets your specific requirements.
Question:
Does this comply with the General Binding Rules for discharge to ground for a domestic sewage treatment plant?
Answer:
This would be determined by your local authority.
Question:
How many cubic metres does this hold?
Answer:
Graf are unable to advice on cubic metres, but have advised it is 300L capacity
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