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.
| Volume (I) | Length (mm) | Width (mm) | Height (mm) | Weight (kg) |
| 130 | 1190 | 490 | 320 | 4,7 |