Orangeburg pipes, also known as "fiber conduit" or "bituminous fiber pipe," were primarily used for sewer lines and other drainage purposes. They are made from layers of wood pulp and pitch pressed together. Introduced in the early 20th century, their use peaked in the 1940s to 1970s, especially in suburban areas. However, due to their susceptibility to deformation and collapse over time, their use has significantly declined, and they are no longer installed. Today, they are mostly found in older residential areas. Best tool for cleaning Orangeburg pipes: When cleaning an Orangeburg pipes, we recommend using Medium Duty Circular Chains or when scale build is quite minimal and the pipe seems to be quite fragile we recommend starting with Gentle Duty Brushes. Always recommend to proceed with caution as if the pipe's condition is badly deteriorated, you might end up cracking or otherwise damaging the pipe when cleaning it.