CAST022/ 05.2004 Case Story: BorECO ™ PP BorECO ™ PP Ridgisewer make replacement easy Polypipe Civil’s light in weight Ridgisewer system made of BorECO PP proved ideal for a recent sub-carriageway sewer replacement contract on a main road outside Thirsk, England undertaken for Yorkshire Water. Replacement as easy as possible The existing concrete pipes at Thirsk had degraded through sulphate attack to such an extent that they

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