Harmer AV300 Aluminium Dome Grate Flat Roof Outlet with Vertical 75mm (3") Spigot

Harmer AV300 Aluminium Dome Grate Flat Roof Outlet with Vertical 75mm (3") Spigot
Alumasc 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.