Innovative Cured-in-Place Pipe Lining

UK utilityYorkshire Waterhas undertaken the country's first trials of an innovative cured-in-place pipe technology for lining sewer pipes, with a wider network roll-out in the works

The pilot trials of the cured-in-place pipe lining (CIPP) technology were undertaken on drains at four domestic properties in Leeds, Hull and Barnsley in late-2014.

Developed by pipe rehabilitation companyNu Flow, the Nu Drain CIPP system was trialled on both clay and pitch-fibre pipes during the Yorkshire Water trials.

According to Yorkshire Water Technical Support Engineer NE region Bob Watterson, the successful results of the trials will see Nu Flow's lining systems likely play a larger role for the utility, especially in the renovation of smaller diameter householder assets.

"Some 22,000 km of private sewers and lateral drains that had previously belonged to Yorkshire Water's customers was added to the utility's asset base with the transfer of private sewers legislation in 2011," said Mr Watterson.

"The previously unmapped pipes and gullies are of variable quality, often at small diameters and not necessarily in the best state of repair.

"The traditional way to repair a lateral connected to a gully is to excavate on the gully and put an accessible gully point in downstream of it, then install a new gully pot. Nu Flow can line round the bend of the existing gully pot in situ, minimising disruption."

Mr Watterson said the water utility was interested in the no-dig technology due to its minimal invasiveness.

"By using no-dig, we're not fuelling excavation vehicles and sending rip-out of the road to landfill and we're not busying up roads while excavations are carried out. Also, importantly, people are unaware we're repairing pipes while they travel about above us."

Yorkshire Water is carrying out further trials with a view to rolling Nu Flow out across its entire network for use by the utility's technicians and service partners, concluded Mr Watterson.

Source: TrenchLess

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Taxonomy

• Technology
• Pipes Design
• Water Utility