Our Services

Pipeline Services

Cleaning, CCTV Inspection and Condition Assessment

Using our high-powered cleaning units to flush debris, remove foreign objects and roots from the pipelines with a closed-circuit television (CCTV) unit our inspection teams have the equipment to perform a thorough pipe inspection. The CCTV inspection teams are equipped with advanced inspection systems capable of working in various size pipes ranging in diameter from 50mm and 1,600mm to produce top quality images. Our coloured pan and tilt crawler mounted cameras supplied by leading international manufacturers have the capability of measuring pipe diameter, ovality and grade.

Once the inspection is completed our technical staff assess the CCTV footage using two software’s being Cleanflow & Wincam to generate an inspection report that is compatible with the latest NZ Pipe Inspection manual. Once the condition assessment is complete our technical staff identify the appropriate pipeline repair method.

Trenchless Renewal of Deteriorated or Damaged Pipes

From the start, our focus was to build our capabilities in the trenchless repair and rehabilitation of deteriorated and damaged pipes. We saw potential to use our expertise to grow in this field and to participate in introducing the most advanced international techniques to the New Zealand market.

Our senior staff engineering qualifications, consultancy experience in addition to their extensive field experience allow us to perform the design and come up with the most suitable innovative solutions to the different problems and challenges we come across. Currently, we have the resource and expertise to install Cured in Place Pipe lining (CIPP) in various domestic and industrial wastewater pipes in addition to stormwater pipes and culverts.

Depending on specific factors related to site conditions, environmental considerations, effluent composition, and temperature, we select the most suitable lining materials and curing methods from the wide variety in our arsenal. Our experienced teams are equipped with the resources to safely carry out all the auxiliary activities related to lining such as pre lining preparation, source detection and CCTV inspections in addition to post lining reopening of live later connections, installing Lateral Junction Repairs (LJRs), testing and final CCTV inspections. Trenchless manhole rehabilitation is another field where we provide our services in, as part of the network renewal process.

We are currently working with our international partners on utilising our experience and resources to expand into the lining of pressure pipelines in the fields of water supply and wastewater. This field is not new to several of our senior staff as they have successfully delivered similar products in the past.

Lateral Lining

The NZ Lining system provides a cost- effective rehabilitation technique for small pipelines of 50-100mm in diameter allowing you to repair pipes by relining them, as opposed to replacing them. NZ Lining offers the best option to rehabilitate small diameter pipes and keep them operating efficiently without using traditional methods of repair that involve digging up yards, driveways and streets. Our liner will eliminate root intrusions, ground water infiltration and restore the structural integrity of the pipeline.

We can install liners in sewer pipes, drain pipes, swimming pools, downpipes and duct work - virtually any size or shape of conduit from 50 mm to 100 mm in diameter. Based on the existing conditions, a liner tube is impregnated with a polyester/epoxy resin. Standard liner tubes are used for straight pipes and more flexible tubes are used for pipes with sharp bends, angles and transitions from smaller to larger diameters.

Rehabilitation & Repairs

Cured in Place Pipe Lining (CIPP)

We offer three methods to repair and renew deteriorated wastewater, stormwater and pressure pipes using our trenchless Cured in Place Pipe (CIPP) lining. Factors effecting the selection include pipe specifics, site conditions, environmental sensitivity, and impact on residents and public.

The CIPP liner is designed according to the following factors:

+ Pipe condition, depth & ovality

+ Pipe Loading including traffic loading, hydrostatic loading

+ Chemical composition, and temperature of effluent, surrounding soil

Our key staff technical and field expertise and wide range of resources and equipment allow us to successfully tackle complicated and challenging projects on pipes ranging in diameter between 100mm to 1,500mm.

Factors taken into consideration when designing the liner and selecting the appropriate products and method include pipe condition, ovality, traffic and other live loading, pipe depth, water table level, chemical composition, and temperature of effluent, surrounding soil, site environmental sensitivity and impact on residents and public in the project area. Our key staff technical and field expertise and wide range of resources and equipment allow us to successfully tackle complicated and challenging projects on pipes ranging in diameter between 100mm to 1,500mm.

Lateral Junction Repairs

NZ Lining provide a trenchless point repair known as a Lateral Junction Repair. Sealing the junction between the lateral pipe connection and the main line is an integral part of the sewer rehabilitation. This stops any infiltration/exfiltration or root intrusion.

The process involves installing a resin impregnated branched patch that is cured in place by ambient cure/heat or UV curing. The lateral junction repair (LJR) is compliant with the international standard ASTMF2561- 11. NZ Lining have the expertise and resources of serval LJR We have the capacity to install LJRs on pipe mains ranging in diameter between 150mm to 900mm.

The same trenchless process of Lateral Junction Repair is also used to seal the junction between a lateral pipe and a newly CIPP lined main to prevent water or roots coming through the lateral from going between the pipe and liner. NZ Lining have the expertise and resources of several LJR systems utilising ambient cure, heat cure and Ultraviolet cure lining techniques. We have the capacity to install LJRs on pipe mains ranging in diameter between 150mm to 900mm.

Lateral Lining

Our CIPP (Cured in Place Lining) system provides a trenchless cost-effective solution to damaged or faulty lateral pipes in industrial, commercial, and residential settings. Our rehabilitation system renews and repairs faulty pipes by relining them in place, as opposed to replacing them. In addition to the cost saving, this method reduces the disruption, environmental impact and saves time, lateral lining can be completed within a few hours.

Our lateral lining service is compliant with the international standard ASTM F1216-16.

Manhole Rehabilitation

We offer several rehabilitation and renewal systems for manholes and underground wastewater structures including sealing of leaks, structural repairs and enhancement and application of protective coating against corrosive chemical attack and inhibiting bacterial growth.

Depending on the existing substrate NZ Lining offer three different coating systems being:

+ Cementitious Coating

+ Epoxy Coating

+ Complete Manhole Lining