Frost Brochure Issue 03 - Catalog - Page 78
Inverted Roof Assemblies - Domed Gratings
Rain water outlets with domed gratings
are suited to inverted roof construction
where the waterproof membrane is
located above the roof deck but below
the insulation layer (diagram page 68).
The stainless steel gravel guard prevents
ballast entering the drainage system
during maintenance. Gravel guards
higher than 150mm are available. (see
page 82). Body and clamp: Aluminium.
Dome: Aluminium. Analytical 昀氀ow rate:
Litres/second based on a head of 35mm.
For details of accessories please see
pages 82-85. Note 1 - Reducing bushes
can be used on threaded outlets to
convert to 2” & 3”.
Frost Aluminium Inverted Roof drain assembly - 昀椀xed dome 220mm and 150mm gravel
guard, medium sump body with clamp, vertical threaded outlet
See Note 1
Part Number
Outlet Size
Flow Rate
(l/s)
34.0304
BSP 4
2.29
34.0303
BSP 3
2.29
Frost Aluminium Inverted Roof drain assembly - 昀椀xed dome 220mm and 150mm gravel
guard, medium sump body with clamp, vertical 400mm spigot outlet
78
Part Number
Outlet Size
Flow Rate
(l/s)
34.0301
100mm
2.29
34.0307
75mm
2.29
