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4 inch (101mm) Round Cast Iron Downpipes

Our Britannia circular rainwater pipes are available in various dimensions and are supplied with a complete range of fittings such as bends, branches, offsets and various brackets

Composition and Manufacture

  • Traditional Sand Cast Iron
  • Manufactured to BS460:1964
  • Bespoke fittings are available on request
  • Complies with all Listed Building, Heritage and Conservation requirements
  • Supplied Transit Primed or Factory applied wet paint finish in semi-gloss black or to a specific RAL/BS colour on request
  • Life expectancy of over 100 years
4 Inch Round Cast Iron Downpipes
4 inch (100mm) round cast iron downpipe x 1.83m eared
4 Inch (100mm) Round Cast Iron Downpipe x 1.83m Eared
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe with Ears x 1.83m (6 ft) BI/P40/6FT/E available in a Transit Primer or Painted Finish
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Ex Vat: £124.54
(Inc £149.45)
4 inch (100mm) round cast iron downpipe offset bend 12 inch projection
4 Inch (100mm) Round Cast Iron Downpipe Offset Bend 12 Inch Projection
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Swan Neck Bend 12 Inch Projection without Ears BI/P40/OS/12 available in a Transit Primer or Painted Finish
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Ex Vat: £95.90
(Inc £115.08)
4 inch (100mm) round cast iron downpipe offset bend 15 inch projection
4 Inch (100mm) Round Cast Iron Downpipe Offset Bend 15 Inch Projection
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Swan Neck Bend 15 Inch Projection without Ears BI/P40/OS/15 available in a Transit Primer or Painted Finish
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Ex Vat: £156.48
(Inc £187.77)
4 inch (100mm) round cast iron downpipe offset bend 18 inch projection
4 Inch (100mm) Round Cast Iron Downpipe Offset Bend 18 Inch Projection
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Swan Neck Bend 18 Inch Projection without Ears BI/P40/OS/18 available in a Transit Primer or Painted Finish
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Ex Vat: £189.74
(Inc £227.69)
4 inch (100mm) round cast iron downpipe offset bend 21 inch projection
4 Inch (100mm) Round Cast Iron Downpipe Offset Bend 21 Inch Projection
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Swan Neck Bend 21 Inch Projection without Ears BI/P40/OS/21 available in a Transit Primer or Painted Finish
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Ex Vat: £216.88
(Inc £260.25)
4 inch (100mm) round cast iron downpipe offset bend 24 inch projection
4 Inch (100mm) Round Cast Iron Downpipe Offset Bend 24 Inch Projection
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Swan Neck Bend 24 Inch Projection without Ears BI/P40/OS/24 available in a Transit Primer or Painted Finish
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Ex Vat: £244.06
(Inc £292.87)
4 inch (100mm) round cast iron downpipe offset bend 27 inch projection
4 Inch (100mm) Round Cast Iron Downpipe Offset Bend 27 Inch Projection
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Swan Neck Bend 27 Inch Projection without Ears BI/P40/OS/27 available in a Transit Primer or Painted Finish
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Ex Vat: £271.20
(Inc £325.44)
4 inch (100mm) round cast iron downpipe offset bend 30 inch projection
4 Inch (100mm) Round Cast Iron Downpipe Offset Bend 30 Inch Projection
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Swan Neck Bend 30 Inch Projection without Ears BI/P40/OS/30 available in a Transit Primer or Painted Finish
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Ex Vat: £271.20
(Inc £325.44)
4 inch (100mm) round cast iron downpipe branch 112.5 degrees
4 Inch (100mm) Round Cast Iron Downpipe Branch 112.5 Degrees
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Branch 112.5 Degrees without Ears BI/P40/BR/112 available in a Transit Primer or Painted Finish
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Ex Vat: £69.57
(Inc £83.48)
4 inch (100mm) round cast iron downpipe branch 135 degrees
4 Inch (100mm) Round Cast Iron Downpipe Branch 135 Degrees
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Branch 135 Degrees without Ears BI/P40/BR/135 available in a Transit Primer or Painted Finish
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Ex Vat: £69.57
(Inc £83.48)
4 inch (100mm) round cast iron downpipe branch 92.5 degrees
4 Inch (100mm) Round Cast Iron Downpipe Branch 92.5 Degrees
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Branch 92 Degrees without Ears BI/P40/BR/92 available in a Transit Primer or Painted Finish
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Ex Vat: £69.57
(Inc £83.48)
4 inch (100mm) round cast iron downpipe access pipe eared
4 Inch (100mm) Round Cast Iron Downpipe Access Pipe Eared
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Inspection Pipe with Ears BI/P40/AP/E available in a Transit Primer or Painted Finish
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Ex Vat: £139.41
(Inc £167.29)
4 inch (100mm) round cast iron downpipe offset bend 9 inch projection
4 Inch (100mm) Round Cast Iron Downpipe Offset Bend 9 Inch Projection
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Swan Neck Bend 9 Inch Projection without Ears BI/P40/OS/09 available in a Transit Primer or Painted Finish
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Ex Vat: £95.90
(Inc £115.08)
4 inch (100mm) round cast iron downpipe offset bend 6 inch projection
4 Inch (100mm) Round Cast Iron Downpipe Offset Bend 6 Inch Projection
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Swan Neck Bend 6 Inch Projection without Ears BI/P40/OS/06 available in a Transit Primer or Painted Finish
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Ex Vat: £79.68
(Inc £95.61)
4 inch (100mm) round cast iron downpipe offset bend 4.5 inch projection
4 Inch (100mm) Round Cast Iron Downpipe Offset Bend 4.5 Inch Projection
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Swan Neck Bend 4.5 Inch Projection without Ears BI/P40/OS/04 available in a Transit Primer or Painted Finish
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Ex Vat: £79.68
(Inc £95.61)
4 inch (100mm) round cast iron downpipe x 1.83m non eared
4 Inch (100mm) Round Cast Iron Downpipe x 1.83m Non Eared
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe without Ears x 1.83m (6 ft) BI/P40/6FT/NE available in a Transit Primer or Painted Finish
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Ex Vat: £118.67
(Inc £142.40)
4 inch (100mm) round cast iron downpipe clip earbelt standard
4 Inch (100mm) Round Cast Iron Downpipe Clip Earbelt Standard
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Clip Earbelt Standard BI/P40/EB/ST available in a Transit Primer or Painted Finish. Used around the socket of a pipe
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Ex Vat: £26.98
(Inc £32.38)
4 inch (100mm) round cast iron downpipe clip holderbat standard
4 Inch (100mm) Round Cast Iron Downpipe Clip Holderbat Standard
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Clip Holderbat Standard BI/P40/HB/ST available in a Transit Primer or Painted Finish
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Ex Vat: £63.72
(Inc £76.46)
4 inch (100mm) round cast iron downpipe loose socket non eared
4 Inch (100mm) Round Cast Iron Downpipe Loose Socket Non Eared
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Loose Socket without Ears BI/P40/LS available in a Transit Primer or Painted Finish
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Ex Vat: £30.78
(Inc £36.94)
4 inch (100mm) round cast iron downpipe loose socket eared
4 Inch (100mm) Round Cast Iron Downpipe Loose Socket Eared
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Loose Socket with Ears BI/P40/LS/E available in a Transit Primer or Painted Finish
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Ex Vat: £30.78
(Inc £36.94)
4 inch (100mm) round cast iron downpipe bend 112.5 degrees
4 Inch (100mm) Round Cast Iron Downpipe Bend 112.5 Degrees
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Bend 112.5 Degrees without Ears BI/P40/B/112 available in a Transit Primer or Painted Finish
More Info
Ex Vat: £47.08
(Inc £56.49)
4 inch (100mm) round cast iron downpipe bend 135 degrees
4 Inch (100mm) Round Cast Iron Downpipe Bend 135 Degrees
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Bend 135 Degrees without Ears BI/P40/B/135 available in a Transit Primer or Painted Finish
More Info
Ex Vat: £47.08
(Inc £56.49)
4 inch (100mm) round cast iron downpipe bend 92.5 degrees
4 Inch (100mm) Round Cast Iron Downpipe Bend 92.5 Degrees
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Bend 92.5 Degrees without Ears BI/P40/B/92 available in a Transit Primer or Painted Finish
More Info
Ex Vat: £47.08
(Inc £56.49)
4 inch (100mm) round cast iron downpipe shoe eared
4 Inch (100mm) Round Cast Iron Downpipe Shoe Eared
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Shoe with Ears BI/P40/SH/E available in a Transit Primer or Painted Finish
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Ex Vat: £58.48
(Inc £70.17)
4 inch (100mm) round cast iron downpipe shoe non eared
4 Inch (100mm) Round Cast Iron Downpipe Shoe Non Eared
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Shoe without Ears BI/P40/SH available in a Transit Primer or Painted Finish
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Ex Vat: £52.47
(Inc £62.96)
4 inch (100mm) round cast iron downpipe offset bend 3 inch projection
4 Inch (100mm) Round Cast Iron Downpipe Offset Bend 3 Inch Projection
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Swan Neck Bend 3 Inch Projection without Ears BI/P40/OS/03 available in a Transit Primer or Painted Finish
More Info
Ex Vat: £79.68
(Inc £95.61)
4 inch (100mm) round cast iron downpipe access pipe non eared
4 Inch (100mm) Round Cast Iron Downpipe Access Pipe Non Eared
ARP Britannia 100mm (4 Inch) Circular Cast Iron Downpipe Inspection Pipe without Ears BI/P40/AP available in a Transit Primer or Painted Finish
More Info
Ex Vat: £139.41
(Inc £167.29)