33.0114
Frost Warm Roof drain assembly - cast iron grating, fixed 240mm circular, medium sump body with clamp, horizontal threaded outlet 4" BSP
ONLY
£ 263 . 97
Excl. VAT
ONLY
£ 316 . 76
Inc. VAT
33.0124
Frost Warm Roof drain assembly - fixed dome 220mm circular, large sump body with clamp, vertical threaded outlet 4" BSP
ONLY
£ 203 . 31
Excl. VAT
ONLY
£ 243 . 97
Inc. VAT
33.0121
Frost Warm Roof drain assembly - fixed dome 220mm circular, large sump body with clamp, vertical spigot outlet 110mm
ONLY
£ 194 . 48
Excl. VAT
ONLY
£ 233 . 37
Inc. VAT
33.0134
Frost Warm Roof drain assembly - fixed dome 220mm circular, large sump body with clamp, horizontal threaded outlet 4" BSP
ONLY
£ 264 . 06
Excl. VAT
ONLY
£ 316 . 87
Inc. VAT
33.0354
Frost Inverted Roof drain assembly - cast iron grating adjustable 200mm square, large sump body with clamp, vertical threaded outlet 4" BSP
ONLY
£ 149 . 67
Excl. VAT
ONLY
£ 179 . 60
Inc. VAT
33.0351
Frost Inverted Roof drain assembly - cast iron grating adjustable 200mm square, large sump body with clamp, vertical spigot outlet 110mm
ONLY
£ 141 . 94
Excl. VAT
ONLY
£ 170 . 32
Inc. VAT
33.0359
Frost Inverted Roof drain assembly - cast iron grating 200mm square, large sump body with clamp, vertical spigot outlet 160mm
ONLY
£ 165 . 23
Excl. VAT
ONLY
£ 198 . 27
Inc. VAT
33.0364
Frost Inverted Roof drain assembly - cast iron grating adjustable 320mm square, large sump body with clamp, vertical threaded outlet 4" BSP
ONLY
£ 186 . 13
Excl. VAT
ONLY
£ 223 . 35
Inc. VAT
33.0365
Frost Inverted Roof drain assembly - cast iron grating non-adjustable 320mm square, large sump body with clamp, vertical threade outlet 6" BSP
ONLY
£ 190 . 47
Excl. VAT
ONLY
£ 228 . 56
Inc. VAT
33.0361
Frost Inverted Roof drain assembly - cast iron grating adjustable 320mm square, large sump body with clamp, vertical spigot outlet 110mm
ONLY
£ 172 . 84
Excl. VAT
ONLY
£ 207 . 40
Inc. VAT
33.0369
Frost Inverted Roof drain assembly - cast iron grating 320mm square, large sump body with clamp, vertical spigot outlet 160mm
ONLY
£ 181 . 63
Excl. VAT
ONLY
£ 217 . 95
Inc. VAT
33.0304
Frost Inverted Roof drain assembly - fixed dome 220mm and 150mm gravel guard, medium sump body with clamp, vertical threaded outlet 4" BSP
ONLY
£ 144 . 90
Excl. VAT
ONLY
£ 173 . 88
Inc. VAT
33.0314
Frost Inverted Roof drain assembly - fixed dome 220mm and 150mm gravel guard, medium sump body with clamp, horizontal threaded outlet 4" BSP
ONLY
£ 202 . 05
Excl. VAT
ONLY
£ 242 . 46
Inc. VAT
33.0324
Frost Inverted Roof drain assembly - fixed dome 220mm and 150mm gravel guard, large sump body with clamp, vertical threaded outlet 4" BSP
ONLY
£ 196 . 81
Excl. VAT
ONLY
£ 236 . 17
Inc. VAT
33.0326
Frost Inverted Roof drain assembly - fixed dome 220mm and 150mm gravel guard, large sump body with clamp, vertical threaded outlet 6" BSP
ONLY
£ 217 . 80
Excl. VAT
ONLY
£ 261 . 36
Inc. VAT
33.0321
Frost Inverted Roof drain assembly - fixed dome 220mm and 150mm gravel guard, large sump body with clamp, vertical spigot outlet 110mm
ONLY
£ 181 . 25
Excl. VAT
ONLY
£ 217 . 50
Inc. VAT
33.0329
Frost Inverted Roof drain assembly - fixed dome 220mm and 150mm gravel guard, large sump body with clamp, vertical spigot outlet 160mm
ONLY
£ 203 . 99
Excl. VAT
ONLY
£ 244 . 78
Inc. VAT
33.0414
Frost Parapet assembly, 45 angle grate, small sump body cast iron 2-way outlet BSP4
ONLY
£ 137 . 50
Excl. VAT
ONLY
£ 165 . 00
Inc. VAT
33.0411
Frost Parapet assembly, 45 angle grate, small sump body cast iron 2-way outlet 100mm DIA
ONLY
£ 132 . 50
Excl. VAT
ONLY
£ 159 . 00
Inc. VAT
33.0414.9
Frost Parapet assembly, 90 deg grate, small sump body cast iron 2-way outlet BSP4
ONLY
£ 141 . 90
Excl. VAT
ONLY
£ 170 . 28
Inc. VAT
Why Choose Drainfast for Roof Drainage Products?
Drainfast supplies a comprehensive range of roof drains, balcony outlets and accessories for commercial construction projects. We partner with trusted manufacturers to provide dependable solutions for controlled rainwater removal across different roof and balcony applications. With over 20 years of drainage industry experience, our technical advisors can help you choose suitable products and coordinate roof drainage with the wider underground drainage system. Our free material take-off service can calculate the pipes, fittings, chambers, covers and accessories required.
With extensive stock across our UK depots and an in-house delivery fleet, we provide next-day delivery to eligible locations for orders placed before 5pm.
Frequently Asked Questions
What is a Roof Drain?
A roof drain is installed level with a flat roof to collect rainwater and direct it into pipework. Gratings, domes or gravel guards help prevent debris from entering the outlet.
What are Roof Drains Used For?
Roof drains remove rainwater from flat and low-slope roofs, preventing standing water and directing it into pipework. Specialist outlets are available for parapets, balconies and other specific roof drainage applications.
What Buildings are Roof Drains Suitable For?
Commercial, industrial and multi-occupancy buildings with flat or low-slope roofs commonly use roof drains. Product selection depends on the roof construction, expected flow rate, connection requirements and project specifications.
What is the Difference Between a Warm Roof Drain and a Cold Roof Drain?
A warm roof has insulation above the roof deck, while a cold roof generally has insulation below it. Each drain connects at the appropriate waterproof membrane level for that construction.
Why is Effective Roof Drainage Important?
A lack of efficient drainage can cause significant damage to a roof. It prevents standing water, which can increase structural loads and contribute to membrane deterioration, leaks, damp and internal damage. Correct specification helps direct rainwater away.
Where Does Water From a Roof Drain Go?
Water passes through rainwater pipework to a surface water sewer, harvesting system, soakaway or attenuation system, depending on the site’s drainage design and project requirements.
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