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Drain Relining / No Dig Trenchless Technology / (CIPP) Cured in Place Pipe

Drain Relining / No Dig Trenchless Technology / (CIPP) Cured in Place Pipe

Drain Relining / No Dig Trenchless Technology / (CIPP) Cured in Place Pipe

Drain relining, also known as ‘no-dig’ or ‘trenchless’ technology, has many advantages over traditional excavation sewer and drain repair. With sewer relining, there is minimal surface and environmental disruption so less inconvenience and costs to the building or asset owner.

A cured-in-place pipe (CIPP) is becoming a common rehabilitation method used to repair existing pipelines in Australia. It has been successfully used throughout Europe and North America since the 1990s by municipal councils, water authorities and homeowners. CIPP is a jointless, seamless, pipe-within-a-pipe that can be tailored to suit drains of any length and diameter starting from 40mm and up.

Common reasons for drain relining:

  • Experiencing frequent blockages
  • Tree roots growing into drains
  • Rusted cast iron drains inhibiting drains to flow properly
  • Broken drain

The Draintech relining process:

The relining process begins with a CCTV inspection survey of your drains to identify damaged areas and also measure distances to any branches that will need reinstating once the liner is cured.

Any obstructions in the drain will be removed in preparation for lining either by high pressure water jet or robotic cutting device.

Once clean, measurements are taken onsite, access points are determined for installation and any other data needed is recorded and taken back to our factory to prepare the liner.

Small liners can be made onsite, but larger liners are made off site at our wet-out facility and specially transported to the jobsite for installation. The wet-out process is where a plastic coated felt tube is impregnated with a specific amount of resin and then evenly rolled while the felt tube is under negative pressure, this ensures even distribution of resin throughout the liner.

This liner is then cooled to a specific temperature for transportation, ready to be installed in the host pipe. Installation can be achieved either by pulling the liner in place and inflating a bladder inside or by inversion, where the felt is inverted inside the pipe pneumatically using our inversion equipment.

The type of resin used, will determine the curing process. Some resins are ambient cured within 1 to 5 hours, these would be generally used on smaller length liners. Other resins can be cured using steam or hot water, the advantage with these resins is they allow longer working time as they will not cure without a specific heat. We can introduce heat using either steam or hot water depending on the situation.

Once curing is complete we undertake a post relining CCTV inspection and if needed reinstate any junctions that were lined over using a specialised robotic cutting device. The customer is left with a new seamless pipe within the old pipe increasing the flow rate of the drain due to its smooth interior.

The advantages of drain relining (as opposed to digging up and replacing) are many:

  • No need to excavate landscaped areas, lawns, driveways or paved areas.
  • Drains can be relined under buildings, where excavation would be costly and disruptive.
  • Most liners can be installed in one day with minimal disruption.

Drain relining, no-dig technology or cured in place pipe (CIPP) are all referring to the same technology which is installing a new pipe within your old pipe, saving you the expense and associated clean-up cost of excavation within your home, garden, driveway or business.

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Drain Relining / No Dig Trenchless Technology / (CIPP) Cured in Place Pipe

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