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Harmer Cast Iron

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Threaded or Spigot
  1. Threaded
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  1. 50mm (2")
  2. 100mm (4")
  3. 150mm (6")
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  1. Harmer
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CI Roof outlets Z-block image

Link to instructions for fitting ADPs

Interested in using our Flow Calculator

Use our rainwater drainage calculator to calculate your property's flow requirements or ‘flow capacity’ of the gutters you're considering purchasing.

Harmer Cast Iron Roof Outlets

Harmer Cast Iron Roof outlets provide a practical solution to many building drainage applications. Inherently strong, cast iron is an ideal choice for load bearing applications. 

Key Benefits

  • Compatible with Harmer SML lightweight cast lightweight cast iron drainage systems. View our range here.
  • Provide flat roof drainage for warm, cold and inverted roofs
  • For flat roof structures with in-situ cast concrete, timber or lightweight metal deck construction
  • Ideal for use with copper and lead-clad roofs where the risk of bi-metallic corrosion is high
  •  

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  1. Harmer C400 - 110mm Cast Iron Vertical Outlet with Dome Grate
    Harmer C400 - 110mm Cast Iron Vertical Outlet with Dome Grate
    Was £132.32 Sale Price £132.32
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    Estimated Delivery date is 02/07/2025
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  2. Harmer C400/D - 110mm Cast Iron Double Flange Vertical Outlet with Polypyrene Dome Grate
    Harmer C400/D - 110mm Cast Iron Double Flange Vertical Outlet with Polypyrene Dome Grate
    Was £275.22 Sale Price £275.22
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    Estimated Delivery date is 02/07/2025
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  3. Harmer C400/DF - 110mm Cast Iron Double Flange Vertical Outlet with Flat Grate
    Harmer C400/DF - 110mm Cast Iron Double Flange Vertical Outlet with Flat Grate
    Was £275.22 Sale Price £275.22
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    Estimated Delivery date is 02/07/2025
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  4. Harmer C400/ECD - 110mm Cast Iron Vertical Outlet, Extension Piece & Adjustable Flat Grate
    Harmer C400/ECD - 110mm Cast Iron Vertical Outlet, Extension Piece & Adjustable Flat Grate
    Was £210.24 Sale Price £210.24
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    Estimated Delivery date is 02/07/2025
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  5. Harmer C400/ESD - 110mm Cast Iron Vertical Outlet, Extension Piece & Adjustable Square Grate
    Harmer C400/ESD - 110mm Cast Iron Vertical Outlet, Extension Piece & Adjustable Square Grate
    Was £198.45 Sale Price £198.45
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    Estimated Delivery date is 02/07/2025
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  6. Harmer C400/ESS - 110mm Cast Iron Vertical Outlet, Extension Piece & Adjustable Square Stainless Steel Grate
    Harmer C400/ESS - 110mm Cast Iron Vertical Outlet, Extension Piece & Adjustable Square Stainless Steel Grate
    Was £375.37 Sale Price £375.37
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    Estimated Delivery date is 02/07/2025
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  7. Harmer C400/F - 110mm Cast Iron Vertical Outlet with Flat Grate
    Harmer C400/F - 110mm Cast Iron Vertical Outlet with Flat Grate
    Was £132.32 Sale Price £132.32
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    Estimated Delivery date is 02/07/2025
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  8. Harmer C400LT - Large Sump 4
    Harmer C400LT - Large Sump 4"BSP Thread Cast Iron Vertical Outlet with Polypyrene Dome Grate
    Was £171.49 Sale Price £171.49
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    Estimated Delivery date is 02/07/2025
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  9. Harmer C400LT/D - Large Sump 4
    Harmer C400LT/D - Large Sump 4"BSP Thread Cast Iron Double Flange Vertical Outlet with Polypyrene Dome Grate
    Was £294.77 Sale Price £294.77
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    Estimated Delivery date is 02/07/2025
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  10. Harmer C400LT/DF - Large Sump 4
    Harmer C400LT/DF - Large Sump 4"BSP Thread Cast Iron Double Flange Vertical Outlet with Flat Grate
    Was £294.77 Sale Price £294.77
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    Estimated Delivery date is 02/07/2025
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  11. Harmer C400LT/DS - Large Sump 4
    Harmer C400LT/DS - Large Sump 4"BSP Thread Cast Iron Double Flange Vertical Outlet with Flat Square Grate
    Was £341.68 Sale Price £341.68
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    Estimated Delivery date is 02/07/2025
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  12. Harmer C400LT/ECD - Large Sump 4
    Harmer C400LT/ECD - Large Sump 4"BSP Thread Cast Iron Vertical Outlet, Extension Piece & Adjustable Flat Grate
    Was £264.32 Sale Price £264.32
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    Estimated Delivery date is 02/07/2025
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  13. Harmer C400LT/ESD - Large Sump 4
    Harmer C400LT/ESD - Large Sump 4"BSP Thread Cast Iron Vertical Outlet, Extension Piece & Adjustable Square Grate
    Was £252.36 Sale Price £252.36
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    Estimated Delivery date is 02/07/2025
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  14. Harmer C400LT/ESS - Large Sump 4
    Harmer C400LT/ESS - Large Sump 4"BSP Thread Cast Iron Vertical Outlet, Extension Piece & Adjustable Square Stainless Steel Grate
    Was £428.87 Sale Price £428.87
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    Estimated Delivery date is 02/07/2025
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  15. Harmer C400LT/F - Large Sump 4
    Harmer C400LT/F - Large Sump 4"BSP Thread Cast Iron Vertical Outlet with Flat Grate
    Was £171.49 Sale Price £171.49
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    Estimated Delivery date is 02/07/2025
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  16. Harmer C400LT/S - Large Sump 4
    Harmer C400LT/S - Large Sump 4"BSP Thread Cast Iron Vertical Outlet with 30x30cm Square Flat Grate
    Was £218.51 Sale Price £218.51
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    Estimated Delivery date is 02/07/2025
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  17. Harmer C400T - 4
    Harmer C400T - 4"BSP Thread Cast Iron Vertical Outlet with Polypyrene Dome Grate
    Was £115.89 Sale Price £115.89
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    Estimated Delivery date is 02/07/2025
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  18. Harmer C400T/D - 4
    Harmer C400T/D - 4"BSP Thread Cast Iron Double Flange Vertical Outlet with Polypyrene Dome Grate
    Was £258.79 Sale Price £258.79
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    Estimated Delivery date is 02/07/2025
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  19. Harmer C400T/DF - 4
    Harmer C400T/DF - 4"BSP Thread Cast Iron Double Flange Vertical Outlet with Flat Grate
    Was £258.79 Sale Price £258.79
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    Estimated Delivery date is 02/07/2025
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  20. Harmer C400T/ECD - 4
    Harmer C400T/ECD - 4"BSP Thread Cast Iron Vertical Outlet, Extension Piece & Adjustable Flat Grate
    Was £193.82 Sale Price £193.82
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    Estimated Delivery date is 02/07/2025
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  21. Harmer C400T/ESD - 4
    Harmer C400T/ESD - 4"BSP Thread Cast Iron Vertical Outlet, Extension Piece & Adjustable Square Grate
    Was £182.01 Sale Price £182.01
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    Estimated Delivery date is 02/07/2025
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  22. Harmer C400T/ESS - 4
    Harmer C400T/ESS - 4"BSP Thread Cast Iron Vertical Outlet, Extension Piece & Adjustable Square Stainless Steel Grate
    Was £358.95 Sale Price £358.95
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    Estimated Delivery date is 02/07/2025
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  23. Harmer C400T/F - 4
    Harmer C400T/F - 4"BSP Thread Cast Iron Vertical Outlet with Flat Grate
    Was £115.89 Sale Price £115.89
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    Estimated Delivery date is 02/07/2025
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  24. Harmer C490T - 4
    Harmer C490T - 4"BSP Thread Cast Iron 90deg Outlet with Dome Grate
    Was £151.60 Sale Price £151.60
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    Estimated Delivery date is 02/07/2025
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  25. Harmer C490T/D - 4
    Harmer C490T/D - 4"BSP Thread Cast Iron Double Flange 90deg Outlet with Dome Grate
    Was £294.50 Sale Price £294.50
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    Estimated Delivery date is 02/07/2025
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  26. Harmer C490T/DF - 4
    Harmer C490T/DF - 4"BSP Thread Cast Iron Double Flange 90deg Outlet with Flat Grate
    Was £294.50 Sale Price £294.50
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    Estimated Delivery date is 02/07/2025
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  27. Harmer C490T/ECD - 4
    Harmer C490T/ECD - 4"BSP Thread Cast Iron 90deg Outlet, Extension Piece & Adjustable Flat Grate
    Was £229.55 Sale Price £229.55
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    Estimated Delivery date is 02/07/2025
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  28. Harmer C490T/ESD - 4
    Harmer C490T/ESD - 4"BSP Thread Cast Iron 90deg Outlet, Extension Piece & Adjustable Square Grate
    Was £217.75 Sale Price £217.75
    You Save 0%
    Estimated Delivery date is 02/07/2025
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  29. Harmer C490T/ESS - 4
    Harmer C490T/ESS - 4"BSP Thread Cast Iron 90deg Outlet, Extension Piece & Adjustable Square Stainless Steel Grate
    Was £394.68 Sale Price £394.68
    You Save 0%
    Estimated Delivery date is 02/07/2025
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  30. Harmer C490T/F - 4
    Harmer C490T/F - 4"BSP Thread Cast Iron 90deg Outlet with Flat Grate
    Was £151.60 Sale Price £151.60
    You Save 0%
    Estimated Delivery date is 02/07/2025
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