/Underground Drainage/Inspection Chambers/Silt Traps and Catch Pits/Silt Traps For uPVC and Twinwall Drainage262247Silt Traps For uPVC and Twinwall Drainagehttps://www.plasticdrainage.co.uk/underground-drainage/inspection-chambers/silt-traps-and-catch-pits/silt-traps15