VicRoads Concrete Double Flushout Riser (SD 1641)

Q: Is the Double Flushout Riser VicRoads compliant?

Yes. It follows VicRoads / DTP SD 1641 arrangements for pavement drains.

Q: Why choose the double version?

Two openings speed up maintenance and help keep the drainage network clear.

Q: How does it integrate with other items?

Coordinate with SD 1611 subsurface pits and SD 1631 terminal details to ensure level control and access.

Description

VicRoads Concrete Double Flushout Riser (SD 1641)

The VicRoads Concrete Double Flushout Riser provides two surface openings for jetting and inspection of subsurface drainage. It complies with VicRoads / DTP SD 1641 arrangements and suits road and civil works where reliable maintenance access is required. Consequently, crews can clear blockages faster and keep drains performing.

Simply put: a concrete access unit with two openings for drain jetting and inspection.

The unit uses durable precast concrete for long service life and low upkeep. Additionally, the twin openings speed up maintenance and reduce downtime. In turn, assets remain serviceable with fewer disruptions.

Alternatively, see the VicRoads Concrete Single Flushout Riser.

Key features & benefits

Compliant detailing: Matches VicRoads / DTP SD 1641 arrangements for drain terminations.
Dual access: Two openings speed up jetting and inspection activities.
Durable precast: Concrete body with separate lids for straightforward replacement.
System integration: Coordinates with SD 1611 subsurface pits and SD 1631 terminal details.
Project ready: Suits pavements, shoulders and embankments that need routine access.

VicRoads Concrete Double Flushout Riser specifications

Standard	VicRoads / DTP SD 1641 — Pavement Drain: Alternative Arrangements
Configuration	Double flushout riser body with two lids (surface access to subsoil drain)
Interface	Access for jetting and inspection; coordinate to project detailing
Associated drawings	SD 1611 (Subsurface Drain — Pits); SD 1631 (Pavement Drain — Terminals)
Variants	Single Flushout Riser (SD 1631)

Note: Confirm levels, bedding, apron details and pipe connections to the engineer’s design and VicRoads requirements.

Installation

Set the unit to SD 1641 arrangement and align with drain invert levels.
Fit and seal both access openings; verify clear jetting paths.
Backfill and compact to maintain grade and reduce scour or settlement.

Download SD 1641 (PDF) | Request a quote

Dimensions

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

FAQs

Is this VicRoads compliant?

Yes. It follows VicRoads / DTP SD 1641 arrangements for pavement drains.

What does a flushout riser do?

It provides surface access for jetting and inspection so crews can clear blockages fast.

Why choose the double version?

Two openings speed up maintenance and help keep the network clear.

How does it integrate with other items?

Coordinate with SD 1611 subsurface pits and SD 1631 terminal details.

Do you supply bodies and lids separately?

Yes. Bodies and lids can be supplied together or as separate items.

What about sizes and weights?

Indicative values are available on request. Confirm at order for project accuracy.

Lead times and delivery?

Standard items are often available promptly; confirm lead time for larger runs. Delivery by truck to be forklift unloaded. Crane available on request.

Datasheets/compliance?

Yes — spec sheets and SD references are available with quote or order.