Drain materials, defects and repair guidance

Drain pipe materials and repair library

Guidance on common drain pipe materials, defects and access, and how they affect lining, local repair or replacement.

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Technical guidanceSources and references

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29 reference records · 5 detailed guides

Pipe material and CCTV survey findings

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.