Flat Roof Drainage

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  1. Cast Iron Roof Outlets
  2. Aluminium Roof Outlets
  3. Couplings
Pick a side style or grate
  1. Closed side
  2. Perforated side
  3. Grate
  1. n/a
  2. Harmer
  3. Wade
Pick a Size
  1. 75 mm (3")
  2. 76mm (3")
  3. 100mm (4")
  4. 150mm (6")
  5. 130 x 140mm
  6. 130 x 75mm
  7. 130 x 55mm
  8. 90-150mm
  9. 55-90mm
  10. 50mm (2")
  11. 200mm
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Delivery Time
  1. 1 Day
  2. 3 Days
  3. 5 Days

We are now stocking a comprehensive range of Harmer drainage outlets. These well designed, tough and highly specified Harmer outlets provide trouble free drainage for a wide range of commercial and domestic application. Light weight but durable, low maintenance and non-corrodible, Harmer outlets are a great choice for draining flat roofs, balconies, car parks and other awkward spaces.

Need some help selecting the right Outlet? You can download the Harmer technical manual and the Wade brochure from our downloads page or get in touch with our friendly, knowledgeable sales team, please email your enquiry to sales@rainclear.co.uk or call 0800 644 44 26


Harmer Roof Cast Iron provides a wide variety of product configurations, permits the use of copper or lead roofing materials and is ideally suited for load bearing application with vehicular traffic.
We've also now sell the WADE range


A comprehensive range of aluminium roof outlets from the highly specified 'Harmer' range with either 50, 75 or 100mm spigots. Harmer Roof AV is an economic, general purpose range of outlets that provides anti-vortex performance. Harmer Roof AV incorporates a patented baffle within the grating, to prevent water swirl and air entrapment, enabling the outlet to drain at 90% of its pipe capacity.



Modulock threshold drainage from Harmer - for raised deck structures such as terraces, balconies and landscaped roofs. Two Slot Channel ranges are also available. Stainless Steel or Galvanised Steel.