Effective drainage protects access areas, structures and surrounding ground from uncontrolled water movement. Where a strong, defined drainage channel is required, a precast concrete coffin drain can provide a durable and practical solution.
Bennett’s manufactures a rectangular concrete coffin drain measuring 2,000 mm long × 450 mm high × 440 mm deep. Individual units can be joined to form a longer drainage run when required.
What Is a Coffin Drain?
A coffin drain is a precast concrete drainage unit with a rectangular profile. It is positioned to collect and direct water along a planned route. Because each section is manufactured before arriving on site, multiple sections can be installed in sequence to create a consistent channel.
The name describes the product’s elongated rectangular form. The correct placement and final drainage design still depend on the site, expected water volume, fall and discharge point.
Where Can Coffin Drains Be Used?
Applications vary between residential, rural, commercial and civil projects. A coffin drain may be considered where runoff needs to be collected and moved away from a high-use or vulnerable area.
- Along access roads, driveways or hardstand areas.
- Around rural sheds, yards and agricultural infrastructure.
- Near commercial or industrial work areas.
- As part of a broader stormwater or site-drainage design.
- In locations where a long, robust concrete drainage channel is preferred.
Why Use Precast Concrete Sections?
Precast components provide known dimensions and can reduce the amount of formwork required on site. Concrete also offers the mass and durability needed in locations exposed to weather, vehicles or regular site activity.
- Consistent dimensions: each unit is manufactured to the same profile.
- Expandable length: sections can be joined to suit the planned run.
- Strong construction: suited to permanent drainage infrastructure.
- Efficient site planning: the required number of units can be calculated from the total run length.
Planning the Drainage Run
The drain itself is only one part of a functioning system. The site must have a suitable fall and a lawful, practical discharge point. The expected flow, surrounding soil, traffic loads and connection details should all be considered before installation.
For projects involving significant stormwater, council-controlled land or engineered infrastructure, seek the appropriate professional advice and approvals. Local requirements may differ between council areas and project types.
How Many Sections Will You Need?
Each Bennett’s unit is 2,000 mm long. The number required depends on the total drainage length, joint arrangement and any site-specific allowances. Accurate site measurements taken before ordering help avoid delays and unnecessary handling.
Discuss Your Concrete Drainage Requirements
Bennett’s supplies precast concrete products for projects across the Shoalhaven, South Coast, Wollongong and Southern Highlands. The team can discuss product dimensions, quantities and delivery considerations for your site.
