Premium precast concrete underground rainwater tanks for residential properties.
Concrete Underground Rainwater Tanks Made in Adelaide
Underground rainwater tanks built to last
Manufactured in South Australia, Ri-Industries’ underground rainwater tanks are made from high-frequency vibrated reinforced concrete, with steel mesh cast into the tank and lid. Their strength and weight make them well suited to long-term underground installation, while four available capacities provide options for a range of residential properties.
Key facts
4 sizes
5,000 to 22,750 litres
Trafficable options
Available for vehicle areas
SA made
Manufactured locally
At a glance
- Four capacities: 5,000, 9,090, 13,640 and 22,730 litres
- High-frequency vibrated reinforced concrete, with steel mesh cast into the tank and lid
- Trafficable and non-trafficable cover slab options
- Inlet and outlet positions configured to suit the site plumbing layout
- Manufactured in Ri-Industries’ South Australian factory
- Manufacturer’s warranty included
Why choose an underground concrete rainwater tank?
Because concrete tanks are installed underground and insulated by the surrounding soil, stored water remains cooler and is protected from sunlight, helping to reduce the conditions in which algae can grow. Underground installation also preserves above-ground garden space and protects the tank from direct sunlight, weather and accidental impact.
Reinforced concrete is strong, stable and non-combustible. Its weight helps the tank remain stable underground, while its construction is not exposed to the ultraviolet degradation that can affect above-ground materials over time.
Manufactured locally, configured for your site
As all tanks are manufactured in our South Australian factory, inlet and outlet positions can be incorporated at the required locations to suit your site and plumbing layout. Specifications can be provided to your plumber, builder, council or engineer on request.
All Ri-Industries rainwater tanks are supported by a manufacturer’s warranty.
Product information
Sizes and specifications
Ri-Industries manufactures four sizes of underground concrete rainwater tank, with trafficable and non-trafficable cover slab options available. View the detailed dimensions, weights and burial information on our specifications page. Read more »
Installation requirements
Correct site preparation and suitable delivery access are essential when installing an underground concrete rainwater tank. View our installation requirements for information about excavation, base preparation, access, unloading clearances and backfilling. Read more »
Maintenance
The reinforced concrete tank itself requires very little maintenance when it is correctly installed. Other parts of the rainwater collection system, including gutters, screens, filters and pumps, still require regular attention. Read more »
Frequently asked questions
What are the benefits of an underground concrete rainwater tank?
An underground concrete rainwater tank does not take up valuable space in your garden and keeps the stored water cooler and protected from sunlight. Concrete is strong, durable and fire resistant, while the weight of the tank helps it remain stable underground. Ri-Industries tanks are made from reinforced concrete, with steel mesh cast into both the tank and lid.
What size rainwater tank do I need for my property?
The right size will depend on your roof catchment area, local rainfall, available space and how you plan to use the water. A household using rainwater for toilets, laundry and garden irrigation will generally need more storage than one collecting water solely for the garden. Ri-Industries can work with your plumber to help identify a suitable tank for your property.
What sizes of concrete rainwater tanks does Ri-Industries manufacture?
Ri-Industries manufactures underground concrete rainwater tanks in four sizes: 5,000, 9,090, 13,640 and 22,730 litres. Each tank has different dimensions and installation requirements. Detailed specifications can be provided to your plumber, builder, council or engineer.
Can a concrete rainwater tank be installed under a driveway or trafficable area?
Yes. Trafficable cover slab options are available for underground concrete rainwater tanks installed beneath areas subject to vehicle traffic. The appropriate tank, cover and installation method will depend on the location, expected loads and required burial depth, so the proposed installation should be assessed before ordering.
Can the inlet and outlet positions be customised to suit my site?
Yes. Because Ri-Industries manufactures its concrete rainwater tanks locally in South Australia, inlet and outlet positions can be configured to suit the plumbing and layout of your property. Providing plans or discussing the requirements with Ri-Industries before manufacture helps ensure the tank is configured correctly for the site.
What maintenance does an underground concrete rainwater tank require?
The reinforced concrete tank itself requires very little maintenance when the site is correctly prepared and the tank is properly installed. Gutters, screens, filters, pumps and other parts of the rainwater collection system should still be inspected and maintained regularly. Requirements may differ depending on how the collected water is used.
What affects the lifespan of a concrete rainwater tank?
The lifespan of a concrete rainwater tank depends on its manufacture, site preparation, installation, ground conditions and ongoing care. Ri-Industries tanks are manufactured from high-frequency vibrated reinforced concrete, with steel mesh cast into the tank and lid, and are supplied with a manufacturer’s warranty.
Request a quote
Talk to Ri-Industries about the right underground concrete rainwater tank for your property. Please include any available site plans, photographs or plumbing information with your enquiry.