COLORBOND® Steel Round Water Tanks


For those who are serious about water storage

Looking for a traditional round tank in either a Colorbond or a galvanised finish? Our standard range of sizes from 200-25,000 Litres means we have a solution for every application.

Diameters from 0.65 to 3.70 metres and heights from 0.65 to 3.50 metres. If these sizes don’t suit your space perfectly, give us a call and we’ll make one to suit you. Still not big enough? Ask us about our rural/commercial range of build onsite tanks ranging from 24,000 Litres to 275,000 Litres.

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Our Slimline Steel Water Tanks are Watermark Approved Tanks

Watermark Approved

Our tanks are certified to ATS 5200.026 standards – proof of a tried and trusted tank design.

Our Slimline Steel Water Tanks use Genuine BlueScope Steel on all our Tanks

Genuine BlueScope

Our tanks are manufactured using BlueScope Steel and high-strength Henrob rivets, and sealed with approved food-grade silicon.​

Our Slimline Steel Water Tanks use COLORBOND® Aquaplate Steel on all our Tanks

Colorbond Aquaplate

Our tanks are built with a specialised material from Bluescope Steel called Aquaplate which has a polymer lining that's safe for drinking water.

Our Slimline Steel Water Tanks are Australian-made in Gippsland, Victoria

Australian Made

Each of our water tanks are individually produced in Gippsland, Victoria, under a strict quality control system.

Popular Round Tank Sizes​

Below are some of our most popular Round Tank sizes

Aquaround 2000T 2000 Litres (Tall Option) 1.18 Dia x 1.87H
Aquaround 4500S 4500 Litres (Squat Option) 2.15 Dia x 1.27H
Aquaround 5000T 5000 Litres (Tall Option) 1.9 Dia x 1.87H
Aquaround 6500T 6500 Litres (Tall Option) 2.15 Dia x 1.87H
Aquaround 10000T 10000 Litres (Tall Option) 2.7 Dia x 1.87H
Aquaround 13500S 13500 Litres (Squat Option) 3.1 Dia x 1.87H
Aquaround 15000T 15000 Litres (Tall Option) 2.9 Dia x 2.32H
Aquaround 18000S 18000 Litres (Squat Option) 3.55 Dia x 1.87H
Aquaround 20000S 20000 Litres (Squat Option) 3.35 Dia x 2.32H
Aquaround 22500S 22500 Litres (Squat Option) 3.55 Dia x 2.32H
Aquaround 22500T 22500 Litres (Tall Option) 3.1 Dia x 3.07H
Aquaround 25000T 25000 Litres (Tall Option) 3.25 Dia x 3.07H

For a full range of our Round Tank sizes, download our brochure

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Colour Options​

Choose from a range of genuine COLORBOND colours

Pale Eucalypt®
Pale Eucalypt®
Woodland Grey®
Woodland Grey®
Deep Ocean®
Deep Ocean®
Woodland Grey®
Night Sky®
Night Sky®
Galvanised Steel Rainwater Tanks by Slimline Rainwater Tanks

The colours shown represent actual product colours as accurately as possible. However, we recommend checking your chosen colour against an actual sample of the product before purchasing, as varying screens and devices may affect colour tones and finish

COLORBOND® steel, BlueScope, the BlueScope brand mark and ® colour names are registered trade marks of BlueScope Steel Limited.

Tank Inclusions​

Everything that comes with your Round Tank


Option of 25mm (standard), 32mm, 40mm, 50 mm, 80mm, 100mm or 150 mm BSP Threaded outlets


Either though the roof of the tank with a mozzie-proof inlet strainer or through the side wall with a PVC spigot


Option of 90mm (standard), 100mm, 150mm, 225mm or 300mm PVC overflows spigots

Retention Orifices

Any size orifice to comply with your stormwater retention requirements

CFA / Firefighting Accessories

Range of CFA Couplings, Storz fittings, vortex inhibitors and Fire Hydrant Tank accessories

Accessories to complement your tank

Pump Kits - including mains changeover kits for toilet/laundry use, Water filters for any application and Tank water level Indicators

Related Tanks​

Not the tank you are looking for? Try our other tank range

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

1,000 to 2,500 Litres

Our range of Aqualong Slimline Tanks are large in volume but still slim enough to fit down the side of most buildings without intruding.

3,000 to 7,000 Litres

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

Up to 7,000 Litres

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