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Drainage Pipe Systems

BS 5255, BS 4514
BS 4660- BS 5481

Code Nominal OD
mm(inch)
Minimum OD
mm
Minimum Wall
Thickness mm
Colour
BS 5255 WASTE
DR-125 36(11/4") 36.15 1.8 WH/LG
DR-15 3(11/2") 42.75 1.9 "
DR-2(50)* 50(2") 50.00 2.0 "
DR-2(55) 55(2") 55.75 2.0 "
BS 4514 SOIL
DR-3/LG 82(3") 82.40 3.0 LG
DR-4/LG 110(4") 110.00 3.2 "
DR-6/LG 160(6") 160.00 3.2 "
BS 4660 UNDERGROUND
DR-4/BR 110(4") 110.00 3.2 BR
DR-6/BR 160(6") 160.00 4.1 "
BS 5481 GRAVITY SEWER
DR-8/BR 200(8") 200.00 4.9 BR
DR-10/BR 250(10") 250.00 6.1 "
DR-12/BR 315(12") 315.00 7.7 "
DR-16/BR 400(16") 400.00 9.8 "