4a Pond Wood Close Northampton NN3 6RT Semilong Services | Drainage works & repairs | NorthamptonWe install, repair, maintain and replace drainage and pipeworks. No matter what your drainage requirements are, Semilong Services can deliver.Water Authority Approved Contractor for Mains Sewer Connections, Build Over’s and Alterations Local Authority Approved for All Street Works including Vehicle Cross Over’s, Carparks, Driveways and Footpaths Surfacing works including Block Paving, Slabs, https://www.semilongservicesltd.co.uk/