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.


Applications, Materials & Installation

  • The Medium Sump range is a compact outlet body in vertical and horizontal variations; the Large Sump range provides a deeper sump for 100 and 150mm vertical pipe; the Two-Way Outlet is suitable for use in a parapet wall construction
  • Provides flat roof drainage for warm, cold and inverted roofs. For flat roof structures with insitu 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 and load bearing applications where rainwater outlets are exposed to vehicular traffic
  • Ideal for connection to continuous waterproofing systems (single layer, built-up felt, mastic asphalt or single ply) and fully compatible with Harmer SML lightweight cast iron systems and all other types of pipework
  • The Harmer cast iron range is cast to BS EN 1561 and is suitable for most types of flat roof drainage
  • Designated load rating up to 12.5 tonnes
  • Medium and large sump outlet bodies are available with varying flow rate capacity

Materials & Finishes

  • The crystallised nature of cast iron gives the material very high strength and robustness and once installed cast iron components resist impact damage, even in exposed areas
  • All Harmer cast iron clamps and grates are surface treated using a sherardizing zinc coating which provides an extremely hard wearing anti corrosive finish
  • Domical grates are made from UK-stable polypropylene to give long life service
  • Two way outlet rectangular grate available in sherardized cast iron, nickel bronze or mill finish aluminium
  • Aluminium grates can be polyester powder coated upon request

Installation & Maintenance

  • Easy and quick to install and low maintenance

Quick Tip

Which roof materials can I use with cast iron roof outlets?

Cast Iron roof outlets are suitable for use with all types of roofing materials including copper and lead clad roofs.

Complementary Products

White House Works, Bold Road, Sutton, St Helens, Merseyside, WA9 4JG