Reinforced concrete pipe, often abbreviated RCP, contains a steel reinforcement cage within the concrete wall, providing higher load and pressure capacity than plain concrete. It is widely used for adopted sewers, large diameter highway drainage and culverts under BS EN 1916 and BS 5911. Diameters are typically 300mm and above, with flexible spigot-and-socket joints sealed by elastomeric gaskets. RCP is identifiable on inspection by its grey concrete interior and the occasional visible reinforcement spalling where degradation has occurred. The pipe is well suited to deep installations and high water tables encountered across the Thames Valley. Common defects include external corrosion of reinforcement where joints have leaked, crown loss from septic gases and root ingress at displaced joints. Repair typically involves grouting, patch lining or full replacement for severely damaged sections.
Reinforced concrete pipe (RCP)
Steel-reinforced concrete pipe used for adopted sewers and large diameter highway drainage.
