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18,000L Round Orbspan Tank


Code GNTTM18000

* Fully integrated ridgeless Orbspan designed roof

* Modern sleek and smooth profile with reinforced radius for dependable strength

* Constructed with RGBlend20 raw material – for strength and UV protection

* 4 x Moulded in lifting lugs

* 2 x 1 1/2″ BSP Outlets at 3 & 9 O’clock

* 1 x 1/2″ Ball Valve

* Inlet strainer & dust cover at 12 O’clock

* 90mm Overflow at 12 O’clock

This product is available for delivery in these areas.

*Colours may not be a true representation of the product**


Product Specifications

More Information
Total Height 2580 mm
Inlet Height 2580 mm
Diameter 3350 mm
Capacity  18,000L

18,000L Rainwater Tank




    • Fully integrated ridge-less Orbspan designed roof.
    • Modern sleek and smooth profile with reinforced radius for dependable strength.
    • Constructed with RGBlend20 raw material – for strength and UV protection.
    • 4 x Moulded lifting lugs.
    • 2 x 1 ½” BSP Outlets at 3 & 9 o’clock.
    • 1 x 1 ½” Ball Valve.
    • Inlet Strainer & Dust Cover at 12 O’clock.
    • 90mm Overflow at 12 O’clock.


Introducing Our 18000L Rainwater Tank: OrbSpan™ Technology for Superior Quality

Experience the pinnacle of rainwater storage with our 18,000L Rainwater Tank, meticulously crafted with cutting-edge OrbSpan™ technology. This tank goes beyond ordinary storage; it represents innovation, strength, and functionality.

OrbSpan™ Design Technology for Unrivaled Performance

Great Northern Tanks takes pride in pushing the boundaries of excellence. Our 18,000L Rainwater Tank features the innovative OrbSpan™ technology, setting it apart from the competition. The fully integrated ridge-less OrbSpan™ roof not only lends a modern and sleek profile but also reinforces the tank’s radius for unmatched strength. This design isn’t just about aesthetics; it’s about delivering dependable performance.

Built for Endurance with RGBlend20 Raw Material

Durability is at the core of our design philosophy. We construct our tanks using RGBlend20 raw material, known for its exceptional strength and UV protection. This ensures that your investment can withstand the harshest Australian conditions, providing you with reliable, long-term water storage.

Designed with Convenience in Mind

Our 18000L Rainwater Tank is thoughtfully designed for your convenience. Equipped with four molded lifting lugs, it’s easy to transport and position. Two 1 ½” BSP outlets, strategically placed at 3 and 9 o’clock, provide efficient access to your stored water. Additionally, a 1 ½” ball valve offers precise control over your water usage.

Clean Water, Always

We understand the importance of pure, clean water. That’s why we include an inlet strainer and dust cover positioned at 12 o’clock. This combination prevents impurities, algae, and debris from contaminating your water. Furthermore, a 90mm overflow at 12 o’clock ensures effective management of excess water.

Enhanced Experience with Free Delivery

To make your experience even better, we offer FREE DELIVERY TO SITE. We believe in providing a seamless journey from purchase to installation, saving you time and effort.

In summary, our 18,000L Rainwater Tank sets a new standard for rainwater storage. With OrbSpan™ technology, RGBlend20 raw material, and thoughtful design features, it delivers unmatched quality, strength, and convenience. Invest in a rainwater tank that surpasses expectations and secure a water-wise future with Great Northern Tanks.


Basalt®, Beige, Blue Ridge®, Bushland®, Classic Cream®, Cottage Green®, Deep Ocean®, Desert Haze, Evening Haze®, Ironstone®, Jasper®, Manor Red®, Monument®, Night Sky®, Pale Eucalypt®, Paperbark®, Shale Grey®, Sufrmist®, Wallaby®, Wheat, Wilderness®, Windspray®, Woodland Grey®

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Get In Touch



Shed 6/388 Taylor Street
Toowoomba QLD 4350

Phone: 07 4566 2900

Northern Territory

2658 Stuart Highway
Livingstone NT 0822

General Enquiries

[email protected]

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