Pipe material tells you what the system is made from; CCTV shows the visible condition inside it. A repair assessment also needs the affected length, connections and available access.
CCTV survey: recording, defect description and measured distance from the access point.
Pipe: material, diameter, shape and any recorded change of size.
Connections: branch positions, bends and the length of the affected section.
Access: chamber locations, pipe route and restrictions around buildings or occupied areas.
Reference sources for this library
These references are used across the library for the products, systems and technical points they cover. Manufacturer information applies to the named product or system; whether a repair is suitable still depends on the installed pipe, its condition and how the drain is used.
Root intrusion can obstruct a drain, but clearing the roots and repairing the entry point are separate issues. The surrounding pipe still needs to be assessed.
A shallow inspection chamber gives access to the drainage system, but it should not be treated as a personnel-entry point. Its type, depth and location determine how it can be used.
Solvent-weld waste joints are different from ring-seal connections. The installed system should be identified before compatibility with a repair product is assessed.
