Name: VicRoads Concrete Single Flushout Risers
Brand: Convic Australia
Availability: InStock
Rating: 5 (1 reviews)

Description

VicRoads Concrete Single Flushout Riser (SD 1631)

The VicRoads Concrete Single Flushout Riser is a surface access point for cleaning and inspection of subsurface/pavement drains that complies with VicRoads / DTP Standard Drawing SD 1631. It enables jetting and debris removal while protecting the pavement structure.

Two formats are available: a compact 450mm x 450mm unit and a larger 950mm x 850mm “with apron” unit for increased surface bearing and access. Units are manufactured from high-strength precast concrete for durability and low maintenance in road and civil environments.

Need two access points? See the Double Flushout Riser.

Key features & benefits

SD 1631 compliant: Matches VicRoads/DTP detailing for single flushout risers and covers.
Maintenance access: Provides a jetting/inspection point to clear blockages and maintain subsoil drains.
Durable precast: Concrete body and lid for long service life and minimal upkeep.
Two sizes: 450mm x 450mm, or 950mm x 850mm with apron for greater bearing and stability.
System-ready: Coordinates with SD 1611 subsurface pits and SD 1641 alternative arrangements.

Applications

Subsoil drainage beneath pavements and shoulders on road and civil projects.
Roads & infrastructure requiring VicRoads/DTP standard maintenance access.
Maintenance programs with routine jetting and inspection requirements.

VicRoads Concrete Single Flushout Riser specifications

Standard	VicRoads / DTP SD 1631 — Pavement Drain: Terminals (single flushout riser detail).
Material	High-strength precast concrete.
Interface	Maintenance access to subsurface/pavement drains per SD 1631 and the project design.
Associated drawings	SD 1611 (Subsurface Drain — Pits), SD 1641 (Pavement Drain — Alternative Arrangements).
Variants	Single Flushout Riser (this page) and Double Flushout Riser; 450mm x 450mm and 950mm x 850mm “with apron”.

Note: Confirm project-specific detailing (levels, bedding, filter material, apron dimensions and placement) to the engineer’s design and SD 1631.

Installing the VicRoads Concrete Single Flushout Riser

Locate and found the riser per SD 1631 (under shoulder/back of kerb as detailed, with concrete apron as specified).
Coordinate levels with upstream pits (SD 1611) and outlet arrangements (SD 1641).
Provide compaction, filter materials and apron construction as shown on SD 1631 and the project drawings.

Download SD 1631 (PDF) | Request a quote

Related: Double Flushout Riser

Dimensions

Product Code	Product Description	Top Size	Bottom Size	Body Weight	Lid Weight	SD REF
VRFLUSHSING450	Single Flushout Riser — body & lid	450mm x 450mm	470mm x 470mm	40kg	10kg	SD 1631
VRFLUSHSING950	Single Flushout Riser — with apron, body & lid	950mm x 850mm	975mm x 875mm	260kg	10kg	SD 1631

FAQs

Is this VicRoads approved?

Use: complies with VicRoads / DTP SD 1631 (single flushout riser detail).

What does a flushout riser do?

Provides a surface access point for jetting and inspection of subsurface/pavement drains.

Single vs Double flushout riser?

Single provides one access point. Double provides two access points for systems with dual lines or higher access needs.

What sizes are available?

450mm x 450mm, and 950mm x 850mm “with apron”.

Where is it typically located?

As detailed on SD 1631—commonly under the shoulder/back of kerb with a concrete apron per the drawing.

Does it connect directly to the pipe?

It provides access to the subsoil/pavement drain run per SD 1631 and the project design.

Do you supply body and lid separately?

Yes—bodies and lids can be supplied together or separately as required.

What are typical weights?

Approx. 40kg body + 10kg lid (450mm unit); approx. 260kg body + 10kg lid (950mm x 850mm with apron). Confirm at order.

Is the apron included?

The 950mm x 850mm option is the “with apron” format. Construct aprons/bedding as detailed on SD 1631 and project drawings.

What other drawings should I coordinate with?

SD 1611 (subsurface pits) and SD 1641 (alternative arrangements).

Lead times & delivery?

Standard items are often available quickly; larger/apron units may require extra lead time. Delivery by truck to be forklift unloaded. Crane available on request.