Pitch-fibre drainage systems have been haunting the professional engineer and the general public for many years.

Previously the only option available for remedial action was excavation, both costly and time consuming. However, recent advancements now mean that deformed or de-laminated pitched fibre can be repaired in-situ, thus making significant savings in time and therefore cost.

The diagram below shows how partially collapsed pitch fibre pipes can be re-rounded without the need for excavation.

The new pipe material is similar to GRP (glass reinforced plastic) and in all cases will be superior in quality and strength to the pipe which it lines. The new pipe is moulded into the damaged pipe by an ingenious method called ‘inversion’ using water or air pressure, which fits it tightly against the wall of the existing pipe. When the inversion is complete the new pipe (which was originally flexible) is now rigid, resulting in a strong, tough pipe tightly fitted within the original pipe with only a minimum loss of cross section, (approximately 3%).

The Renoline System is suitable for sewers, culverts, tunnels, pressure mains, gas pipes, down pipes etc. It can also be used to seal tanks, chambers and manholes. Renoline is resistant to most aggressive chemicals and can withstand extremely high temperatures