Slimline Rainwater Tanks — The Original & Still The Best

Over 38 years ago, our company pioneered the first ‘slimline’ shape water tank. Now this shape tank is a go-to for any new house with limited backyard space.

Our Range

We design, manufacture and deliver steel water tanks of every shape and size to suit commercial, domestic, rural and industrial sites.

1,000 to 2,500 Litres

Our Slimline Colorbond Steel Water Tanks range are our ‘Slimmest’ Slimline Rain Water Tanks – Ranging from 1,000 to 2,500 Litres.

3,000 to 7,000 Litres

Our range of Aquaplate Slimline Squared Tanks offers you a modern, sleek design to suit any application. Boasting a capacity of up to 7,000L.

Up to 7000 Litres

Our range of Aquaplate Slimline Squared Tanks offers you a modern, sleek design to suit any application. Boasting a capacity of up to 7,000L.

1,000 to 25,000 Litres

Need some serious water storage? Our range of Aquaplate Round Tanks boast a large volume capacity of up to 25,000L.

Built to Last

We Invented the Slimline shape

We Invented the 'Slimline' shape

First came the Slimline shape…next was our unique Slimline Squared range …now we are going to invent a tank specially for you! Custom made sizes and designs
Designed and Built for Architects

Designed & Built for Architects

We actually are the best: Combining 30 Years of Experience with Innovation has made us the market leader in Colorbond Tanks
Genuine BlueScope Steel

Genuine Bluescope® Steel

We only use the real stuff – we don’t believe in just spraypainting. Genuine prepainted Colorbond Aquaplate Steel has been designed for the harsh Australian environment.
Unsurpassed Quality

Quality Built Water Tanks

After 30 years we really know what we’re doing and we are passionate about making tanks. Each tank undergoes a strict QA test before leaving our factory
Long-life Construction Warranty

Long-life Construction Warranty

If it breaks we fix it… but we make them unbreakable to start with. Our tanks are backed by the Bluescope Steel Warranty for peace of mind assurance
Unsurpassed Quality

Unsurpassed Quality

Don’t just take our word on it – each tank is Engineered and Certified to Australian Standards. We were the first watertank to become Watermarked

Why Our Tanks?

Subtle differences that make our tanks simply the best


Constructed using Genuine BlueScope® Steel and and high-strength Henrob rivets


Aquaplate® lined for drinking quality and safety. Meets AS4020: Safe Drinking Water usage


Strength of Steel means they won't bulge or split (Water is heavy! - 1000 Litres = 1 ton)

Why Choose Steel Water Tanks?


Watermarked, Engineer Certified and eligible for Government Rebates


20 years BlueScope® Warranty PLUS Slimline's own construction warranty

Better Backed

Over 30 year old company with highly trained staff

Latest articles

What size tank should I buy?

Finally … winter is over and spring is here! (thankfully, don’t know about you but we’re sick of this grey weather!) Summer is just around the corner, and although we all enjoy the great weather we do need to think responsibly about our water use over the summer months. A question we get asked all the time here at Slimline:

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Aquaplate rainwater tanks

What is Aquaplate?

Aquaplate is a specialised material developed by Bluescope Steel specifically for drinking-water tanks. It is Australia’s premium tank-making material, and is backed by a 20 year warranty. This material has an internal tough food-grade, two-ply polymer lining bonded to the steel during manufacture on BlueScope’s production lines. In short, this means that water cannot ever touch the steel, eliminating rust

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