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.
Ribbed-wall gravity sewer pipe has a profiled outer wall and a smooth internal bore. Product identification and the internal survey both matter when a repair is assessed.
Technical notes
Product identification: record the pipe type, size and any visible markings.
CCTV finding: internal bore condition, connections and measured defect position.
