Concrete pipe is a non-reinforced or lightly reinforced drainage pipe traditionally used in larger surface water sewers, road gully connections and culverts across the UK from the 1920s onwards. Manufactured to BS 5911 with diameters ranging from 150mm to over 1800mm, the pipe is identifiable on a CCTV survey by its grey, slightly textured interior and broad cement-mortar socket joints. Concrete is durable for surface water flows but vulnerable to acid attack from septic foul sewage, which can cause progressive crown corrosion over decades. In Greater London, concrete pipes are commonly found in mid-century surface water sewer networks, particularly in postwar housing estates. Where investigation reveals widespread crown loss or structural distortion, full replacement or large diameter CIPP lining is generally specified rather than spot repair.
Concrete pipe
Concrete drainage pipe used historically for larger surface water sewers and stormwater drainage.
