Note: Inlet is 3” higher than outlets. Cut off end of cone at marker line. Lay D-Box completely level. Foundation excavation for the raised DB is 60cm minimum to ensure pipe protection and must be compacted well. Find details about foundations here Doc n° MF4-M15 “General construction standards” § Structures foundation. Once the ground is compacted arrange overflow, inlet and outlets on the ground. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. This includes the rear wall, side panels, doors, door handle a d ventilation grille with climate filter for the air intake. And the control cabinet standard DIN EN (IEC ) stipulates t at control cabinets must be equipped with a seamless. The splitter box and distribution boxes serve as essential devices for dividing a slurry feed into multiple outlet streams, ensuring the uniform distribution of particle sizes and controlled flow to each outlet. Dave is Extension Onsite Sewage Treatment Educator.