Drainage System Section Detail with Bottle Gully and 400 mm Pipe

Drainage system section detail showing floor drainage construction with bottle gully trap, junction pipe connection, and reinforced concrete slab assembly. The AutoCAD drawing illustrates a vertical floor drain system installed through the slab with stainless steel grade 304 grating and frame at the top surface. The section shows layered floor construction, including approved flooring finish, 50 mm thick concrete screed with welded wire mesh, a separation layer membrane, and 50 mm thick closed-cell polystyrene insulation. The drainage outlet connects to the bottle gully trap below the slab using a pipe sleeve arrangement that maintains alignment and structural clearance within the floor structure.