Our sales and technical team have over 20 years’ experience working with the industry leading rainwater systems available in the UK.
Expert advice
Our friendly service and competitive prices combined with a step-by-step support approach, make for easy rainwater product selection.
Nationwide delivery
Our delivery partners cover the whole of the UK (mainland only) so no matter where you are, we can get your order to you.
Premium quality
Our aluminium, steel, cast iron, plastic & GRP rainwater systems are all sourced from the leading manufacturers in the UK to ensure they are of the highest quality.
Harmer Roof Aluminium AV Retro Gulley Outlet, available in Dome or Flat grate, in sizes 75mm, 100mm & 150mm. A premium, high performance aluminium roof outlet range featuring integral sump bodies and enhanced flow Anti-Vortex system.
Harmer Roof AV Retro-Gulley outlets are designed to fit within the existing outlet and pipework of the roof which is being upgraded. Because of minimal disturbance and the ease with which the Retro-Gulley is fitted, it represents an extremely cost-effective and efficient solution to flat roof upgrading.
Harmer Aluminium Roof Outlets offer a wide choice of outlet designs that cater for most types of building drainage applications. Harmer AV rainwater outlets provide optimum flow performance even in extreme rainfall conditions.