The Ornamental Airbrick (OAB) is available in three sizes: 225mm × 75mm (2.8kg), 225mm × 150mm (4.1kg), and 225mm × 225mm (5.8kg). All sizes have a uniform depth of 75mm, making them consistent to install across a subfloor ventilation course.
Established 1893 | BS 460:2002 Certified | UK & International Supply | Expert Technical Support | 0333 987 4452
£89.50 – £147.90Price range: £89.50 through £147.90 ex VAT (£107.40 – £177.48 inc VAT)
Our plain deep half round 135 degree angle for cast iron gutter and deep gutter system
are suited to most period property renovations. Cast iron deep half round gutter is
available in primed and black as standard.
Sizes Available:
100 x 75mm
125 x 75mm
A genuine cast iron rainwater system with the traditional deep flow gutter.
UK delivery from £30. Fittings are despatched boxed. See delivery rates.
Plain Deep Half Round 135 Degree Angle
A genuine cast iron rainwater pattern the deep half round is available in two profile sizes. The profile is a larger version of the more traditional half round pattern and offers increased capacity.
Cast iron gutters and pipes offer great strength and durability, a proven history of long life, low noise operation and fire resistance. Most old buildings have cast iron rainwater systems that should be maintained and preserved however; these inherent benefits make a cast iron rainwater system an ideal choice for both traditional and modern installations.
| Size/Finish | Primer 100mm x 75mm, Primer 125mm x 75mm, Black 100mm x 75mm, Black 125mm x 75mm |
|---|---|
| Socket | Internal, External |
Cross-reference
| Primer 100mm x 75mm | DH4312 (LH) / DH4313 (RH) |
| Primer 125mm x 75mm | DH5312 (LH) / DH5313 (RH) |
| Black 100mm x 75mm | XDH4312 (LH) / XDH4313 (RH) |
| Black 125mm x 75mm | XDH5312 (LH) / XDH5313 (RH) |
The Ornamental Airbrick (OAB) is available in three sizes: 225mm × 75mm (2.8kg), 225mm × 150mm (4.1kg), and 225mm × 225mm (5.8kg). All sizes have a uniform depth of 75mm, making them consistent to install across a subfloor ventilation course.
The Brass Rooflight Pole Winder Opener 300mm is a screw-jack operated rooflight opener designed for manual control of timber-framed skylights and Lumen Rooflights. The 300mm fixed arm is suited to standard rooflight positions and is finished in polished brass.
The H528 measures 760mm wide x 370mm deep x 565mm high, making it well suited to the largest properties in the range — substantial country houses, civic buildings and ecclesiastical projects.
The H532 measures 560mm wide x 290mm deep x 305mm high, making it well suited to a broad, low-profile design suited to substantial roofs and box gutters on period commercial and civic buildings.
Prices are shown on each product page for both sizes and all three finishes. For project quantities, specification support, or conservation enquiries, call us on 0333 987 4452 or use the contact form on our website.
The H1 is available to accept round pipe connections in 65mm, 75mm, 100mm, and 150mm diameters. The 65mm and 75mm variants measure 305mm wide by 197mm deep and 210mm high. The 100mm variant measures 355mm wide by 230mm deep and 240mm high. A 150mm connection option is also available — please contact the team for dimensions.
Yes. The Louvre Airbrick is dimensioned to standard brick course openings and is suitable for direct replacement of worn, broken, or missing original cast iron louvre grilles. If you are unsure of the size required, measure the opening in the brickwork rather than the existing damaged grille.
The Antique Black finish suits Victorian, Edwardian, and inter-war buildings where ventilation ironwork was painted rather than polished — estate houses, terrace housing, civic buildings, and rural properties. It is also correct for listed buildings and conservation area properties requiring like-for-like replacement of original ornamental cast iron vents.
The in-house Premier Extra coating is formulated for a life expectancy of around 10 years under normal weather conditions, provided any impact damage or surface scuffing is made good promptly. Coastal locations or higher pollution levels can shorten this, so it's worth asking your local stockist or paint manufacturer for site-specific advice.
The H544 measures 380mm wide x 220mm deep x 418mm high, making it well suited to Georgian and Victorian townhouses and period commercial buildings.


