Liner Installation

Published: May 13, 2017 | Last updated: July 5, 2023

What Does Liner Installation Mean?

Liner installation, in the context of trenchless technology, can be defined as the process of installing an inverted resin soaked liner within a damaged pipe and expanding it using heat or UV light to fit it into the pipe. This method is suitable for use in smaller diameter gravity pipelines.


Trenchlesspedia Explains Liner Installation

Liner insertion is done from an upstream access point like a manhole or by excavation. The liner is inverted using air pressure or water. Hot water, steam, UV light or heat is used to melt the resins in the liner which then expands and fits into the pipe forming a jointless, tight fitting replacement that is corrosion resistant. This method is cost effective and easy to complete. In order to prevent waste water from entering any gap, a hydrophilic material is placed at lateral connections and at end of the host pipe.


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