Articles & Case Studies


Posted: Monday 14th July 2014

Relining of 20,000 additional Yorkshire Water service pipes is underway in Leeds following the success of a similar project in the region last year using an innovative pipe lining solution from diversified technology company 3M.

Scotchkote Rapid Setting Polymeric Lining 166L developed by 3M in collaboration with HTC Ltd and Yorkshire Water, was created to help reduce lead migration into drinking water passing through the estimated 9.3 million lead service and 6.3 million communication pipes in the UK.

By using this particular solution Yorkshire Water contractors are able to rehabilitate up to 20 properties per day compared to 15 per week using traditional rehabilitation techniques, where new plastic pipe is inserted. As the innovative method uses the existing pipe it is much more efficient and can take only 15 minutes to clean and line one service pipe. It is also more flexible than typical epoxy formulation linings, which accomodates future movement in the lined pipes caused by loading or deformation.

Traditional methods of reducing lead content without a full replacment programme have included orthophosphate dosing at source, however this can cause problems at treatment works, is increasingly costly and not sustainable.

Scotchkote Rapid Setting Polymeric Lining 166L by 3M is a solution that has previously gained industry recognition when it achieved the 2011 ‘Best Innovation’ award from The Society of British Water and Wastewater Industries (SBWWI), a trade association for the UK water industry and supply chain.

Steve Taylor from Yorkshire Water said: “The majority of homes that were built before 1970 are supplied with water running through lead pipes. Now a days it is evermore important that we help meet current and future legislation around reducing the lead content in our customers’ water.

“Our recent experience with Scotchkote Rapid Setting Polymeric Lining 166L by 3M has proven it to be the most cost effective solution for us. Also the process has been developed to enable us to enter the pipes through the customer’s stop taps with the ability to go into the property with no excavation or disrution. Overall it is a more environmentally responsible, safer method of work.”

Richard Christopher from HTC Ltd explains: “The product is applied using the patented Serline air vortex system, which injects the mixed Scotchkote 166L resin from 3M into a carefully controlled air flow and allows the air to carry the product quickly down the pipe, depositing the fast-curing resin to the dry wall of the pipe. It effectively uses the air stream within the pipe and, at the required position, creates turbulence to act as the application medium.”

The project is scheduled to be completed before the end of 2014.

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