Drainfast Brochure Issue 36 - Flipbook - Page 203
Rain water outlets with flat gratings
suited to warm roof construction
where the waterproof membrane is
located above the insulation layer
on top of the roof deck. Body and
clamp: Cast iron. Grating: Ductile iron.
Analytical flow rate: Litres/second
based on a head of 35mm. For details
of accessories please see pages 211215. Note 1 - Reducing bushes can be
used on threaded outlets to convert
to 2” & 3”.
Frost roof drain domed grating with medium sump
body and threaded outlet
See Note 1
Part Number
Outlet Size
Loading
Flow Rate (l/s)
BSP 4
L15
7.88
33.0104
Ø349
Ø220
Part Number
6
Frost roof drain domed grating with medium sump
body and spigot outlet
105
50 min
80 max
£203.22
Ø110
Outlet Size
Loading
Flow Rate (l/s)
100mm
L15
7.88
33.0101
£193.30
50 min
80 max
Ø349
Part Number
Outlet Size
Loading
Flow Rate (l/s)
BSP 4
L15
7.88
117
179
Frost roof drain flat grating with medium sump body
and horizontal threaded outlet
See Note 1
4 BSP
6
Ø220
93
33.0114
£263.97
action@drainfast.co.uk
203
www.drainfast.co.uk
7 FROST ROOF DRAINS
Warm Roof Assemblies Flat Gratings
