U-Channels, Flow Slots & L-Shaped Gutter Stones
U-shaped diversion channel moulds, perforated and notched flow slots, coin-pattern downspout channels, L-shaped diversion curb & gutter stones and corner / water-stop fittings — 53 sizes in PP and ABS for agricultural drainage, road runoff, residential stormwater and municipal projects.
U-shaped diversion channel moulds for agricultural drainage, road runoff control, garden irrigation and industrial drainage. The smooth U-section improves flow capacity and easy cleaning.
53 qualified product examples across 4 groups — plain U-section diversion channels, perforated/notched/coin-pattern functional slots, L-shaped diversion curb & gutter stones, and corner / water-stop fittings. More sizes, hole layouts and OEM sections can be quoted from drawings or sample photos.
Smooth U-section diversion channel moulds in PP and ABS — open runoff / irrigation / farmland drainage flow channels.
U-Shaped Diversion Channel Mould 30×10×5cm (ABS)
U-Shaped Diversion Channel Mould 30×10×5cm (ABS) · angle 2
U-Shaped Diversion Channel Mould 30×11.5×6cm (ABS)
U-Shaped Diversion Channel Mould 30×11.5×6cm (ABS) · angle 2
U-Shaped Diversion Channel Mould 30×15×5cm (3-hole matched set)
U-Shaped Diversion Channel Mould 30×15×5cm · angle 2
U-Shaped Flow Channel Mould 30×15×5cm (PP)
U-Shaped Diversion Channel Mould 30×15×5cm (ABS)
U-Shaped Diversion Channel Mould 50×19.5×7cm
U-Shaped Diversion Channel Mould 57.8×20×5cm
U-Shaped Diversion Channel Mould 59.5×11.5×6cm
U-Shaped Diversion Channel Mould 60×15×6cm
U-Shaped Diversion Channel Mould 60×15.5×8cm
Diversion U-Channel Mould 60×15.6×8cm
ABS U-Shaped Diversion Channel Mould 60×20×5cm
ABS U-Shaped Diversion Channel Mould 60×20×6.3cm
U-Shaped Diversion Channel Mould 60×20×10cm (ABS)
ABS Downspout U-Channel Mould 60×20×10cm (5-hole)
ABS U-Shaped Diversion Channel Mould 60×30×6cm
Functional U-channel moulds: multi-hole downspout slots (3/5/6/8 holes), end-notched flow channels and decorative coin-pattern surface.
3-Hole U-Channel Mould 30×15×5cm (matched diversion set)
6-Hole U-Channel Mould 30×18.5×8cm (ABS)
6-Hole U-Channel Mould 30×18.5×8cm (ABS) · angle 2
Notched U-Channel Mould 30×20×6cm (10×1.5cm notch)
Notched U-Channel Mould 30×20×6cm · angle 2
Coin-Pattern U-Channel Mould 30×20×6cm (10×1.5cm notch)
Coin-Pattern U-Channel Mould 30×20×6cm · angle 2
Notched U-Channel Mould 30×30×6cm (15×1.5cm notch)
Coin-Pattern U-Channel Mould 30×30×6cm (15×1.5cm notch)
U-Channel Mould 60×30×8cm (2cm slot depth)
5-Hole Downspout U-Channel Mould 60×30×8cm
U-Shaped Flow Channel Mould 62×30×6.3cm
Coin-Pattern Downspout U-Channel Mould 62×30×6.3cm
ABS Notched U-Channel Mould 60×30×6cm
ABS Coin-Pattern U-Channel Mould 60×30×6cm (15×1.5cm notch)
L-Shaped Diversion Curb Mould 30×15×6cm
L-section diversion curb / gutter stone moulds (side-drain kerb) — vertical wall + flat base, with or without drain holes.
L-Shaped Diversion Curb Mould 30×15×6cm · angle 2
L-Shaped Gutter Stone Mould 30×15×6cm
L-Shaped Downspout Mould 30×20×6cm
L-Shaped Kerb Mould 50×13×6.5cm
L-Shaped Diversion Curb Mould 60×8.4×5cm
L-Shaped Diversion Curb Mould 60×10×6cm
L-Shaped Diversion Curb Mould 60×11.4×5cm
L-Shaped Diversion Curb Mould 60×15×6cm (PP)
L-Shaped 6-Hole Downspout Mould 60×15×6cm (ABS)
L-Shaped 8-Hole Downspout Mould 60×15×6cm (ABS)
L-Shaped Diversion Curb Mould 30×10×5cm (with holes)
L-Shaped Diversion Curb Mould 30×10×5cm (no holes)
Inside/outside corners and curved water-stop (diversion barrier) sections that complete an L-type residential drainage run.
L-Shaped Gutter Inside Corner Mould 30×30×6cm
L-Shaped Gutter Outside Corner Mould 30×30×6cm
L-Shaped Residential Channel Inside Corner Mould 30×15×6cm
L-Shaped Residential Channel Outside Corner Mould 30×15×6cm
L-Shaped Residential Channel Inner Water-Stop Mould 30×15×6cm (R50/R100)
L-Shaped Residential Channel Outer Water-Stop Mould 30×15×6cm (R100/R150)
Use this checklist to match drainage channel, U-drain and cover moulds to your local stormwater project before asking for a quotation.
Most drainage mould buyers compare PP and ABS according to concrete part size, expected reuse cycle, demoulding method and budget. For covers with many holes or narrow ribs, the mould structure should leave enough demoulding clearance and avoid weak corners.
| Buyer need | Recommended mould direction | Quote details to prepare |
|---|---|---|
| Roadside stormwater drainage | Plain U-shaped diversion channel mould plus matching cover | Channel length, inner width, depth, wall thickness and cover seat size |
| Residential community perimeter (against wall/kerb) | L-shaped gutter stone mould, perforated or plain | Length × wall height × base width, hole count, with/without side drain holes |
| Downspout / pipe connection points | 3/5/6/8-hole perforated U-channel or notched connector mould | Hole count, hole spacing, slot depth, notch width × depth and open ends |
| Turns and ends of an L-shaped run | Inside/outside corner units + curved water-stop barriers | Corner size and barrier radius (R50/R100/R150), one mould per radius |
| Decorative pedestrian drainage | Coin-pattern (铜钱) channel mould | Outer size and notch layout; pattern is cosmetic anti-slip surface |
Yes. Send finished concrete dimensions (inner width × depth × length), wall thickness, hole or notch layout, drawings, sample photos or local standards. We review the mould structure and quote standard or custom production.
Plain U-channels in normal sizes demould well in PP (lower cost, 150+ pour cycles). ABS is recommended for perforated / multi-hole downspout channels and L-shaped corner pieces: the narrow ribs between holes and the right-angle L-section need higher stiffness to survive repeated demoulding without chipping. Tell us the model and usage; we will suggest the material.
No. The 3/5/6/8-hole layout is moulded in — the holes form part of the concrete shape. Each hole count is a separate mould, and the spacing/slot depth (e.g. 2 cm slot depth on the 60×30×8 downspout channel) is fixed. Give us your pipe or slot layout first; do not plan to drill cured concrete, which cracks the section.
End notches (commonly 10×1.5 cm or 15×1.5 cm) let two channel runs connect or let water enter from the side. State notch width × depth and how many ends are open. A notch that is too wide leaves a loose joint; too narrow and the mating channel will not seat. Notched and coin-pattern versions of the same outer size (e.g. 30×30×6 or 60×30×6) are different moulds — order by the surface name printed on the product photo.
The U-channel is an open trough for a free-standing drainage line. The L-shaped gutter stone (L型水沟石 / 导流侧石) is an L-section kerb-and-gutter unit: the vertical back wall sits against a wall or road edge and the flat base carries the flow — it is the standard residential-community (小区) perimeter drainage unit. L-shaped pieces are available plain, perforated (6/8-hole downspout versions) or with/without side drain holes.
Inside and outside corner units (30×30×6 for gutter stones, 30×15×6 for residential L-channels) turn a run 90°. Curved water-stop / barrier pieces (内挡水 / 外挡水) are made to fixed radii — commonly R50/R100 for inner barriers and R100/R150 for outer barriers. Like any curved precast part, one mould serves one radius: count inside and outside corners separately per plan, and give the radius when ordering curved barriers.
C25–C30 concrete with proper vibration and curing works for standard drainage components. Wall thickness (5–8 cm on most U-channels, 6–6.5 cm on L-gutter stones) is driven by backfill / traffic load, not by channel width — roadsides with vehicle load need thicker walls and reinforcement regardless of the hydraulic section.
Yes. Mixed-SKU container orders are common for municipal and residential drainage contractors. We recommend grouping components by project line (channel bodies + matched notches/holes + corner pairs + covers) so nothing is missing on site.