Space saving, easy to install and lightweight – specifically designed for use in rural areas – with a capacity of 130 litres.

Every wastewater treatment system (both primary and secondary) requires a land application area to discharge the treated effluent. GRAF has developed a strong and durable arch trench drain (also refered to as leach drain) to achive this via absorption principle in the most sustaibable and efficient way.

  • The GRAF infiltration tunnel has been mainly designed for the use in private and rural areas
  • The system which consists of one or several tunnel modules and two end plates can be extended at will
  • Ergnomically Designed & Engineered with ease of use in mind, a single module only weights 11kg.
  • 5 years warranty


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