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'No dig' pipe lining trialled on sewer network

Sewer pipe

A “no dig” pipe lining system will be used to extend the lifespan of underground sewers and water mains by up to 75 years, potentially saving millions of pounds.

Large sections of utility firm Yorkshire Water’s underground infrastructure will be renewed – rather than replaced – with the new technology, which could also reduce traffic disruption as it removes the need to dig up road surfaces.

The coating was developed with a spray lining application that rapidly sets to make a “pipe within a pipe”, creating a 3mm layer of extra structural integrity that protects against cracks and bursts.

“We have carried out successful trials on our sewer network, which have shown that this is a highly effective and innovative way to renew ageing infrastructure,” said Yorkshire Water project manager Mark Gregory.

“By applying this technology we will substantially reduce the risk of failure to our ageing underground assets and also improve the lifespan by 75 years. It is a cost-effective solution with a low carbon footprint.”

Yorkshire Water plans to use the technology – developed by industrial coatings manufacturer Spencer Coatings – on vulnerable rising main sewers, and to examine its potential use for the waste and clean water networks.

The company is working with public health and safety organisation NSF-WRc to establish industry standards for use of the new technology.

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