Drain materials, defects and repair guidance
Guidance on common drain pipe materials, defects and access, and how they affect lining, local repair or replacement.
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29 reference records · 5 detailed guides
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.
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.
11 matching records · Clear search
Pipe connections and access
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.
Pipe connections and access
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.
Pipe connections and access
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.
Pipe connections and access
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.
Pipe connections and access
Foul drainage carries wastewater from connected fixtures. The route and affected connections help identify the section that needs investigation.
Pipe connections and access
A diameter transition changes the bore size within a drain run. Both pipe sizes and the shape of the transition matter when a repair is designed.
Above-ground waste pipework
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.
Pipe connections and access
A rainwater connection needs a confirmed route to its intended destination before repair or reconnection is specified.
Pipe connections and access
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.
Above-ground waste pipework
A soil-stack branch connects branch pipework to the vertical stack. Its floor level and connection layout help locate and assess a reported defect.
Above-ground waste pipework
Solvent-weld waste joints are different from ring-seal connections. The installed system should be identified before compatibility with a repair product is assessed.
Published by Drain Relining. Sources checked 12 September 2026. Editorial standards.
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