Mon – Fri: 7:00 am – 5:00 pm
Sat: 8:00 am – 12:00 pm
Mon – Fri: 7:00 am – 5:00 pm
Sat: 8:00 am – 12:00 pm
This deep flow gutter 4m is a high-capacity uPVC rainwater gutter for roofs that overflow a standard half-round system. The profile is 114mm wide and 71mm deep, so it holds and moves more water than a classic 112mm half-round channel.
Each length is 4 metres. Colours: White, Black, Anthracite Grey and Brown. This deep flow gutter 4m is designed to work with a 68mm downpipe system.
£1.00
Performance on this product: flow rate 1.8 litres per second and a drained roof area of 86m² (typical single-outlet figure — exact capacity still depends on fall and whether the outlet is at the end or in the middle of the run).
SKU: DRG4
Also known as: deepflow gutter, hi-cap gutter, high capacity gutter, 4m deep flow, 114mm gutter.
| Deep flow gutter 4m (this product) | Half round gutter 4m | |
|---|---|---|
| Profile | Deeper, higher capacity | Traditional curved channel |
| Size | 114mm wide × 71mm deep | Standard domestic half round |
| Length | 4m | 4m |
| Downpipe | 68mm | Typically 68mm |
| Guide capacity | 1.8 l/s · ~86m² | Lower — fine for smaller roofs |
| Best for | Larger planes, heavy rain, fewer overflows | Typical houses, like-for-like replacement |
If the existing gutters are half round and the roof is modest, stay on half round so the look matches. If the same elevation ponds or overshoots in heavy rain, step up to a deep flow gutter 4m.
Do not mix deep-flow lengths with half-round fittings. Seals and clips are system-specific.
| Attribute | Detail |
|---|---|
| Product | Deep flow gutter 4m |
| SKU | DRG4 |
| Material | uPVC |
| Length | 4 metres |
| Width | 114mm |
| Height / depth | 71mm |
| Flow rate | 1.8 l/s |
| Area drained (guide) | 86m² |
| Downpipe | 68mm |
| Colours | White · Black · Anthracite Grey · Brown |
| Joints | Matching deep-flow unions with seals |
| Support | Deep-flow fascia brackets |
| Maintenance | Wipe / flush — no painting |
A centre running outlet on a long elevation will usually serve more roof than a stop-end outlet at one end. For very large or multi-bay roofs, add extra outlets rather than stretching one run.
Tiles should overhang slightly into the gutter. Too short and water misses the channel; too tight against the back and debris dams the flow.
Fall
Fall the deep flow gutter 4m towards the outlet. A common target is about 1:350 (roughly 3mm per metre). Level gutters silt and overflow sooner.
Brackets
Typical spacing up to 600mm centres; closer on exposed or snow-load elevations. Place a bracket within about 150mm of every joint, angle, outlet and stop end.
Expansion
uPVC moves. Leave the system’s marked gap at unions. Do not glue sealed clip joints.
Outlet height
Sit the gutter close under the roof edge so water drops in cleanly (often around 50mm below the tile line — follow the fitting instructions).
Keep every fitting in the same deep-flow system and colour. We can take off a list from a sketch of the elevations and drain positions.
01621 842 000 · WhatsApp 07949 280 147 · sales@showcaseplastics.co.uk
Mon–Fri 7am–5pm · Sat 8am–12pm
Maldon, Heybridge, Chelmsford, Colchester, Witham, Braintree, Burnham-on-Crouch, South Woodham Ferrers, Billericay, Basildon, Rayleigh, Southend, Romford and CM, CO, SS, RM, IG postcodes.
Not a full manufacturer method statement — follow the system instructions, or ask us to supply and fit.
| Colour | Typical match |
|---|---|
| White | White fascia and windows |
| Black | Most tile colours |
| Anthracite Grey | Grey frames and modern fascia |
| Brown | Older brown uPVC |
Trade: 4m lengths, higher capacity without jumping to industrial 170mm systems.
DIY: if half-round overflows in heavy rain, this is usually the next step — we will check roof area and outlet positions with you.
Add this deep flow gutter 4m to an online estimate with fascia, soffit and 68mm pipe. We aim to reply within 24 hours. Collect from Maldon or ask for delivery when the job starts.
What is a deep flow gutter 4m?
A deep flow gutter 4m is a 4-metre high-capacity uPVC gutter, 114mm wide and 71mm deep, for roofs that need more flow than half round.
How much roof will it drain?
This listing is rated around 86m² and 1.8 l/s as a guide. Fall and outlet position change the real figure.
What downpipe does it use?
68mm.
Deep flow or half round?
Half round for a standard house and a matching look. Deep flow gutter 4m when half round cannot keep up.
Can I join it to old half-round fittings?
No — use deep-flow fittings throughout.
Which colour?
Match fascia and frames: anthracite with grey, black with most tiles, white with white fascia.
Do you fit as well as supply?
Yes.
Collection or delivery?
Both. Showcase Plastics, Unit 6, Heybridge Industrial Estate, Maldon CM9 4XL.
