No Dig Technology
Drain Lining and Patch Repairs
Water and root ingress through displaced and open joints can be damaging to the drainage system and can result in pipe work collapse and structural damage to property. By sealing the damaged pipe work with a patch liner or in more severe cases by inserting a liner along the length of the pipe, further damage can be prevented and the life of the system extended indefinitely.
The liner or patch is impregnated with a polyester resin and then inserted into the drain. Once in place the liner is inverted using water or air pressure and left to cure, in the majority of cases this work is completed within a day. The flexi liners now available make it possible for the liner to follow any shape, forming a unique seamless tube, capable of going round 90º bends without wrinkles.
Once in position the resin sets and glues the liner to the host pipe. Fractures in the pipe are sealed; dramatically increasing pipe strength and eliminating leaks and smells from cracked pipes or stopping ingress from the surrounding soil or roots into the pipes.
Pitch Fibre Reforming
Where pitch fibre pipes have become blistered and deformed, depending on the severity, it may be possible to carry out reforming and lining. A bullet is winched through the pipe work to smooth out and reduce the deformities and a liner is then inserted to seal the pipe work, therefore extending the life of the pipe work with minimum disruption.
Pipe Bursting
This is a trench-less method of replacing buried pipelines, without the need for excavating.
An expanding head device, which may be either pneumatic or hydraulic is introduced into the defective pipeline through a launch pit. As it travels through the pipeline towards the receiving pit it breaks the pipe into many small pieces, pushing the pieces into the surrounding soil. New pipe is attached to the back of the expander head, replacing the line immediately.
Pipe bursting may also be used to expand pipeline capacity by replacing smaller pipes with larger ones. Works by the gas and water industries has demonstrated the feasibility of upsizing gas mains, water mains and sewers.
Moling
This method is predominately used for the laying of water mains with the minimum disruption to surfaces above ground. It is a method employed by us wherever ground conditions allow. It requires the digging of launch pits from where the mole is inserted, it then tunnels underground forming a channel for the new water main pipe work to be passed through.
This method is particularly welcome where customers have driveways or gardens that they would prefer not to have dug.
