CPS drainage solutions have been on the estate relining some of our surface water drains.
All the work is done under a large tent as they are using UV light
The knitted felt liner is impregnated with vinyl ester resin. By filling one end with resin it is evenly distributed by pulling the liner through gauging rollers, under a vacuum.
The liner is everted into the pipe by feeding it through a compressed air gun. This means the resin is now on the outside of the liner.
The resin is cured by pulling a UV light head through the pipe at a controlled speed.
These liners have a 25 year guarantee but hopefully they should last much longer.