SD 1641–compliant double flushout riser for subsoil/pavement drains.
The VicRoads Concrete Double Flushout Riser provides two surface openings for jetting and inspection of subsurface drainage. It complies with VicRoads / DTP Standard Drawing SD 1641 arrangements and suits road and civil works where reliable, repeat maintenance access is required.
In simple terms: a concrete access point with two lids so crews can reach the drain and clear it quickly.
Manufactured in high-strength precast concrete, the unit is sized for road and civil environments and gives a durable, low-maintenance termination to the drain run.
| Standard | VicRoads / DTP SD 1641 — Pavement Drain: Alternative Arrangements |
| Configuration | Double flush-out riser body with two lids (surface access to subsoil drain) |
| Interface | Access for jetting, CCTV and inspection; coordinate to project detailing |
| Associated drawings | SD 1611 (Subsurface Drain — Pits); SD 1631 (Pavement Drain — Terminals) |
| Variants | Single Flushout Riser |
Note: Confirm levels, pipe connections, bedding, apron details and erosion control to the engineer’s design and authority requirements.
See the Dimensions tab for indicative size/weight, and FAQs for approvals and usage.
| Product Code | Product Description | Top Size | Bottom Size | Body Weight | Lid Weight | SD REF |
|---|---|---|---|---|---|---|
| VRFLUSHDOUB950 | Double flushout riser — body & two lids | Confirm at order | Confirm at order | Indicative — confirm | Indicative — confirm | SD 1641 |
Yes. The double flushout riser follows VicRoads / DTP SD 1641 arrangements for pavement/subsoil drains.
It provides surface access for jetting, CCTV and inspection so crews can clear blockages quickly and keep the network performing.
The two openings speed up maintenance, allow staged access and provide redundancy.
Coordinate with SD 1611 (subsurface pits) and SD 1631 (pavement drain terminals) as shown on the project drawings.
Yes — bodies and lids can be supplied together or as separate items.
Indicative values are available with your quote; final dimensions/weights are confirmed at order for project accuracy.
Lead time depends on run size and workload. Delivery by truck to be forklift unloaded. Crane available on request.
We’ll provide spec sheets and SD references with your quote or order.
