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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: £109.87
(Inc £131.84)
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: £84.60
(Inc £101.52)
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: £138.03
(Inc £165.64)
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: £167.38
(Inc £200.86)
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: £191.32
(Inc £229.58)
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: £215.30
(Inc £258.36)
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: £239.24
(Inc £287.09)
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: £239.24
(Inc £287.09)
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: £61.37
(Inc £73.64)
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: £61.37
(Inc £73.64)
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: £61.37
(Inc £73.64)
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: £122.98
(Inc £147.58)
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: £84.60
(Inc £101.52)
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: £70.29
(Inc £84.35)
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: £70.29
(Inc £84.35)
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: £104.68
(Inc £125.62)
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: £23.81
(Inc £28.57)
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: £56.21
(Inc £67.45)
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: £27.16
(Inc £32.59)
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: £27.16
(Inc £32.59)
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
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Ex Vat: £41.53
(Inc £49.84)
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: £41.53
(Inc £49.84)
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: £41.53
(Inc £49.84)
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: £51.58
(Inc £61.90)
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: £46.28
(Inc £55.54)
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: £70.29
(Inc £84.35)
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: £122.98
(Inc £147.58)