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.
A bend changes the direction of a drain and may limit how lining or inspection equipment can pass. Its position and angle matter when a repair is planned.
A branch brings another drain into the main run. Its position and geometry matter because any lining or local repair has to account for the connected pipework.
The connection where a drain enters a manhole or chamber may itself need repair. The transition and the chamber condition can affect the work required.
Flexible couplings join compatible sections of drainage pipe. When a nearby joint or pipe is defective, the materials, sizes and connection geometry on both sides matter.
Push-fit waste pipework should be identified separately from other waste systems. Pipe size, bore and accessible joint positions matter when inspection or repair is considered.
A ring-seal joint seals the connection between compatible components. Leakage, movement and an obstruction at the joint are separate findings and may lead to different repairs.
Solvent-weld waste joints are different from ring-seal connections. The installed system should be identified before compatibility with a repair product is assessed.
