Terracotta or clay sewer pipes, similar to vitrified clay pipes, are traditionally used in underground sewer systems. They're favoured for their long lifespan and resistance to chemical degradation. These pipes, made from natural clay, are especially common in older installations and are well-suited for conveying wastewater due to their robustness against aggressive environments. While their usage has declined with the introduction of more modern materials, terracotta pipes are still valued in some areas for their environmental compatibility and durability. Best tool for cleaning & descaling Terracotta/Clay Sewer Pipes: Cleaning Clay pipes requires careful working. Carefully inspect the condition of the pipe and make sure to test your solution of choice in an easy location to verify the suitability of the cleaning method. We recommend using any Circular Chain. If the scale build is minimal try with the Gentle Duty Brushes to avoid any kind of damage to the pipe. if the Gentle Duty is not enough you should try Circular Chains. Medium Duty Chain Knockers and Heavy Duty Chain Knockers are for more aggressive needs but always recommend proceeding with caution as if the pipe's condition is badly deteriorated, you might end up cracking or otherwise damaging the pipe when cleaning it.