Pipe Rehabilitation Glossary

Pipe rehabilitation glossary

This glossary gathers the main terms used in pipe inspection, diagnosis and rehabilitation. The goal is to explain technical concepts in a clear and practical way.

CIPP (Cured In Place Pipe)

Structural rehabilitation method that creates a new pipe inside the existing one using a resin-impregnated liner.

Epoxy lining

Application of epoxy resin inside the pipe to seal leaks, improve watertightness and protect against corrosion. It is not a structural solution.

CCTV inspection

Internal pipe inspection using cameras, used for technical diagnosis, identification of defects and planning of interventions.

Watertightness

The ability of a pipe to prevent water from entering or escaping. Loss of watertightness leads to leaks and infiltration.

Stack (vertical pipe)

Vertical pipe running through multiple floors in a building, typically used for wastewater or drainage systems.

Branch connection

Connection between a fixture (kitchen, bathroom, etc.) and the main pipe.

Buried pipe

Pipe installed underground, typically part of external sewer, drainage or stormwater systems.

Crack

Linear opening in the pipe wall that may evolve into a failure or leak.

Break / fracture

Structural failure of the pipe involving material loss or significant opening, affecting system performance.

Infiltration

Entry of external water into the pipe through joints, cracks or structural defects.

Exfiltration

Leakage of water from inside the pipe to the surrounding ground or structure.

Misalignment

Displacement between pipe sections, commonly at joints, which can lead to deposits and flow restriction.

Obstruction

Partial or complete blockage of the pipe caused by debris, roots or foreign objects.

Mechanical cleaning

Removal of deposits and build-up using brushes, chains or rotating tools.

Pipe preparation

Set of operations performed before rehabilitation, including cleaning, clearing and structural verification.

Liner (manga)

Flexible material inserted into the pipe during CIPP, which after curing forms a new internal pipe.

Fiberglass (GRP)

Material used in structural CIPP liners, offering high mechanical strength and long-term durability.

Felt liner

More flexible liner material used in some CIPP applications, with more limited structural performance.

UV / LED curing

Process of hardening the resin using ultraviolet light, allowing controlled and fast installation.

Structural rehabilitation

Intervention that creates a new pipe with independent structural capacity inside the existing one.

Localized repair

Targeted repair of a specific defect without rehabilitating the full pipe section.

Technical diagnosis

Assessment of pipe condition based on inspection and defect analysis, used to define the appropriate solution.

Need help understanding a report or diagnosis?

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