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Harmer Aluminium

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multi-balcony solution - Harmer extended flushjoint spigot + Flushjoint downpipe

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 Aluminium Roof Outlets

Manufactured by Alumasc, these Harmer Roof AV Vertical rainwater outlets are designed for use with flat roof structures, using either in-situ cast concrete, timber or lightweight metal deck construction.

Harmer Roof Outlets are ideal for connection to continuous waterproofing systems using single-ply membranes, mastic asphalt, high-performance built-up felt and liquid-applied systems.

Compatible with Harmer SML lightweight cast iron systems and all other types of pipework

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  1. Harmer AV200 Aluminium Dome Grate Flat Roof Outlet with Vertical 50mm (2
    Harmer AV200 Aluminium Dome Grate Flat Roof Outlet with Vertical 50mm (2") Spigot
    Was £187.19 Sale Price £187.19
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    Estimated Delivery date is 26/06/2025
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  2. Harmer AV300 Aluminium Dome Grate Flat Roof Outlet with Vertical 75mm (3
    Harmer AV300 Aluminium Dome Grate Flat Roof Outlet with Vertical 75mm (3") Spigot
    Was £245.26 Sale Price £245.26
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    Estimated Delivery date is 26/06/2025
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  3. Harmer AV400 Aluminium Dome Grate Flat Roof Outlet with Vertical 110mm (4
    Harmer AV400 Aluminium Dome Grate Flat Roof Outlet with Vertical 110mm (4") Spigot
    Was £319.44 Sale Price £319.44
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    Estimated Delivery date is 26/06/2025
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  4. Harmer Aluminium AV400 Vertical Outlet - Domed Grate - Extended Spigot - 100mm Dia
    Harmer Aluminium AV400 Vertical Outlet - Domed Grate - Extended Spigot - 100mm Dia
    From £354.95
    Estimated Delivery date is 16/07/2025
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  5. Harmer AV600 Aluminium Dome Grate Flat Roof Outlet with Vertical 160mm (6
    Harmer AV600 Aluminium Dome Grate Flat Roof Outlet with Vertical 160mm (6") Spigot
    Was £409.22 Sale Price £409.22
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    Estimated Delivery date is 01/07/2025
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  6. Harmer AV200 Aluminium Flat Grate Flat Roof Outlet with Vertical 50mm (2
    Harmer AV200 Aluminium Flat Grate Flat Roof Outlet with Vertical 50mm (2") Spigot
    Was £187.19 Sale Price £187.19
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    Estimated Delivery date is 26/06/2025
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  7. Harmer AV300 Aluminium flat Grate Flat Roof Outlet with Vertical 75mm (3
    Harmer AV300 Aluminium flat Grate Flat Roof Outlet with Vertical 75mm (3") Spigot
    Was £248.40 Sale Price £248.40
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    Estimated Delivery date is 26/06/2025
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  8. Harmer AV400 Aluminium flat Grate Flat Roof Outlet with Vertical 110mm (4
    Harmer AV400 Aluminium flat Grate Flat Roof Outlet with Vertical 110mm (4") Spigot
    Was £348.38 Sale Price £348.38
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    Estimated Delivery date is 26/06/2025
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  9. Harmer AV600 Aluminium flat Grate Flat Roof Outlet with Vertical 160mm (6
    Harmer AV600 Aluminium flat Grate Flat Roof Outlet with Vertical 160mm (6") Spigot
    Was £433.30 Sale Price £433.30
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    Estimated Delivery date is 01/07/2025
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  10. Harmer AV200T Aluminium Dome Grate Flat Roof Outlet with Vertical 2
    Harmer AV200T Aluminium Dome Grate Flat Roof Outlet with Vertical 2"BSPT Thread
    Was £191.31 Sale Price £191.31
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    Estimated Delivery date is 02/07/2025
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  11. Harmer AV300T Aluminium Dome Grate Flat Roof Outlet with Vertical 3
    Harmer AV300T Aluminium Dome Grate Flat Roof Outlet with Vertical 3"BSPT Thread
    Was £245.27 Sale Price £245.27
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    Estimated Delivery date is 02/07/2025
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  12. Harmer AV400T Aluminium Dome Grate Flat Roof Outlet with Vertical 4
    Harmer AV400T Aluminium Dome Grate Flat Roof Outlet with Vertical 4"BSPT Thread
    Was £349.02 Sale Price £349.02
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    Estimated Delivery date is 02/07/2025
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  13. Harmer AV600T Aluminium Dome Grate Flat Roof Outlet with Vertical 6
    Harmer AV600T Aluminium Dome Grate Flat Roof Outlet with Vertical 6"BSPT Thread
    Was £418.03 Sale Price £418.03
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    Estimated Delivery date is 01/07/2025
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  14. Harmer AV200T-F Aluminium Flat Grate Flat Roof Outlet with Vertical 2
    Harmer AV200T-F Aluminium Flat Grate Flat Roof Outlet with Vertical 2"BSPT Thread
    Was £191.31 Sale Price £191.31
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    Estimated Delivery date is 02/07/2025
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  15. Harmer AV300T Aluminium flat Grate Flat Roof Outlet with Vertical 3
    Harmer AV300T Aluminium flat Grate Flat Roof Outlet with Vertical 3"BSPT Thread
    Was £248.40 Sale Price £248.40
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    Estimated Delivery date is 26/06/2025
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  16. Harmer AV400T Aluminium flat Grate Flat Roof Outlet with Vertical 4
    Harmer AV400T Aluminium flat Grate Flat Roof Outlet with Vertical 4"BSPT Thread
    Was £373.18 Sale Price £373.18
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    Estimated Delivery date is 26/06/2025
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  17. Harmer AV600T Aluminium flat Grate Flat Roof Outlet with Vertical 6
    Harmer AV600T Aluminium flat Grate Flat Roof Outlet with Vertical 6"BSPT Thread
    Was £442.12 Sale Price £442.12
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    Estimated Delivery date is 01/07/2025
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  18. Harmer 2TW/M Aluminium Two-Way Parapet Roof Mini Outlet with 2
    Harmer 2TW/M Aluminium Two-Way Parapet Roof Mini Outlet with 2" (50mm) BSPT Thread
    Was £248.60 Sale Price £248.60
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    Estimated Delivery date is 26/06/2025
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  19. Harmer 3TW Aluminium Two-Way Parapet Roof Outlet with 3
    Harmer 3TW Aluminium Two-Way Parapet Roof Outlet with 3" BSPT Thread
    Was £321.28 Sale Price £321.28
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    Estimated Delivery date is 26/06/2025
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  20. Harmer 4TW Aluminium Two-Way Parapet Roof Outlet with 4
    Harmer 4TW Aluminium Two-Way Parapet Roof Outlet with 4" BSPT Thread
    Was £337.85 Sale Price £337.85
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    Estimated Delivery date is 26/06/2025
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  21. Hamer Aluminium Two Way Outlet with Extended Spigot - 100mm Dia
    Hamer Aluminium Two Way Outlet with Extended Spigot - 100mm Dia
    From £365.22
    Estimated Delivery date is 16/07/2025
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  22. Harmer RAV100 Aluminium Dome Grate Flat Roof Outlet with 100mm (4
    Harmer RAV100 Aluminium Dome Grate Flat Roof Outlet with 100mm (4") Retro Gulley
    Was £388.41 Sale Price £388.41
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    Estimated Delivery date is 01/07/2025
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  23. Harmer 100mm Aluminium Push-Fit Parapet Downspout
    Harmer 100mm Aluminium Push-Fit Parapet Downspout
    £242.02
    Estimated Delivery date is 01/07/2025
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  24. Harmer AV290 Aluminium Dome Grate Flat Roof Outlet with 90 Degree 50mm (2
    Harmer AV290 Aluminium Dome Grate Flat Roof Outlet with 90 Degree 50mm (2") Spigot
    Was £244.17 Sale Price £244.17
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    Estimated Delivery date is 01/07/2025
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  25. Harmer AV290F Aluminium Flat Grate Flat Roof Outlet with 90 Degree 50mm (2
    Harmer AV290F Aluminium Flat Grate Flat Roof Outlet with 90 Degree 50mm (2") BSPT Thread
    Was £300.83 Sale Price £300.83
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    Estimated Delivery date is 01/07/2025
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  26. Harmer AV290F Aluminium Flat Grate Flat Roof Outlet with 90 Degree 50mm (2
    Harmer AV290F Aluminium Flat Grate Flat Roof Outlet with 90 Degree 50mm (2") Spigot
    Was £244.17 Sale Price £244.17
    You Save 0%
    Estimated Delivery date is 01/07/2025
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  27. Harmer AV290 Aluminium Dome Grate Flat Roof Outlet with 90 Degree 50mm (2
    Harmer AV290 Aluminium Dome Grate Flat Roof Outlet with 90 Degree 50mm (2") BSPT Thread
    Was £302.92 Sale Price £302.92
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    Estimated Delivery date is 01/07/2025
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  28. Harmer AV245 Aluminium Dome Grate Flat Roof Outlet with 45 Degree 50mm (2
    Harmer AV245 Aluminium Dome Grate Flat Roof Outlet with 45 Degree 50mm (2") Spigot
    Was £280.95 Sale Price £280.95
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    Estimated Delivery date is 01/07/2025
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  29. Harmer AV245F Aluminium Flat Grate Flat Roof Outlet with 45 Degree 50mm (2
    Harmer AV245F Aluminium Flat Grate Flat Roof Outlet with 45 Degree 50mm (2") Spigot
    Was £262.24 Sale Price £262.24
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    Estimated Delivery date is 01/07/2025
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  30. Harmer AV390 Aluminium Dome Grate Flat Roof Outlet with 90 Degree 75mm (3
    Harmer AV390 Aluminium Dome Grate Flat Roof Outlet with 90 Degree 75mm (3") Spigot
    Was £338.78 Sale Price £338.78
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    Estimated Delivery date is 01/07/2025
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