Inversion Sewer Lining

Published: July 30, 2017 | Last updated: July 5, 2023

What Does Inversion Sewer Lining Mean?

Inversion sewer lining is a method of relining old pipes to increase their life span and make them more resistant to chemicals and abrasion. This method of pipe rehabilitation is carried out in small to medium sized drain pipes with sizes ranging from 40 to 225 mm, and also in pipes with diameter variations along its length having bends and junction boxes. This method of relining can be used for most commercial and domestic repairs and can be carried out from a manhole without having to dig.


Trenchlesspedia Explains Inversion Sewer Lining

Inversion sewer lining is carried out by using a pipe relining material that is impregnated with a resin that is specially formulated for this purpose. The liner is set in the inverted position when being placed inside the pipe to be repaired, thus bringing the resin in contact with the inside of the pipe. The liner is then filled with compressed air to inflate it. As the liner fills with air, it pushes the resin soaked side against the pipe walls until all contours and bends are lined. The pipe is then allowed to cure by filling it with hot compressed air, or hot water, to aid the bonding process between the liner and the pipe wall. These liners are highly resistant to chemicals, abrasion and corrosion.


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