Services First Limited's designs and layouts would fully detail the drainage and sewer networks on and offsite complete with gradients, pipe sizes and invert levels. Cover levels and pipe materials will also be displayed if required.
A comprehensive legend would allow the recipient to distinguish between different types and sizes of manholes & inspection chambers, gullies, type of drainage run (foul, SW, combined, land drainage, etc) and other ancillary facilities such as pump stations, head walls, flow restrictors, etc.
Drainage calculations and/or analysis would accompany any submission as would all relevant adoptable / private standard drainage construction details.
All designs would conform to the requirements of BS EN 752, The Building Regulations Part H, and Sewers for Adoption 7th Edition and BRE 365 (soakaways).