Round Rainwater Tanks

Round Water Tanks| Round Tanks | Round Water Storage Tanks

Thousands Of Different Sizes Available. Delivered To Your Door. All Tanks Come With Extended Warranty & Are Fire Resistant. Find Out More Today.

Round Rainwater Tanks | Round Tanks

Round water tanks are a tried and tested icon of Australia, for household, agricultural and industrial water storage. With a corrugated finish in either Stainless steel or Colorbond materials they can be custom built, perfect for your requirements.

Round Rainwater Tanks FAQs | Round Rainwater Tanks Best Materials | Round Rainwater Tanks Size & Capacity Guide


Select Water Tanks can manufacture your round rainwater tank with a capacity from as little as 190 litres up to a huge 29,800 litres. With a diameter as little as 900mm they can still fit into those smaller spaces you have available, or if there are no access or room restrictions, they can be built and transported with a 3700mm diameter.

As with all tanks, the height of the tank you choose, is an important factor to consider and being able to manufacture to a range of heights from 300mm to 3100mm high, allows us to manufacture your round rainwater tank to suit your site perfectly.

Select Water Tanks custom build each tank to order, which gives our customers the best tank to suit their requirements. The Round tanks come with 3 standard inclusions: A 400mm Inlet Strainer and Light Guard, a 25mm Outlet with Ball Valve, and a 90mm Overflow with Stainless Steel Gauze, which can be positioned to your requirements. Additional fittings, like a bucket height tap or additional 25mm or 50mm outlets and ball valves, can be added to the tank to meet your needs.

Round Water Tanks

Please note: Tanks larger than 3500mm diameter have a max height of 2350mm

Jumbo Round Rainwater Tank

Jumbo Stainless Steel Round Tank

Short Round Tank

Short Round Water Tank

Round Rainwater Tanks

Multiple Tall Round Tanks

Round Rainwater Tank Capacity Guide

Approx Capacity  Diameter x Height (mm) 
2,000 Litres (440 Gallons) 1300 x 1560
3,000 Litres (660 Gallons) 1300 x 2350
5,000 Litres (1100 Gallons) 1900 x 1880
8,000 litres (1750 Gallons) 2300 x 1880
10,000 litres (2200 Gallons) 2900 x 1560
15,000 litres (3300 Gallons) 3500 x 1560
20,000 litres (4400 Gallons) 3300 x 2350 (1)
20,000 litres (4400 Gallons) 3700 x 1880 (2)
20,000 litres (4400 Gallons) 2900 x 3100 (3)
22,600 litres (4970 Gallons) 3500 x 2350
29,800 litres (6555 Gallons) 3500 x 3100

Round Rainwater Tanks – Popular Sizes

2000 Litre Round Rainwater Tank

2000l Round Water Tanks

3000l Round Rainwater Tank

3000l Round Water Tanks

5000 Litre Round Rainwater Tank

5000l Round Water Tanks

10000l Round Rainwater Tank

10000l Round Water Tanks

15000 Litre Round Rainwater Tank

15000l Round Water Tanks

20000 Litre Round Rainwater Tank

20000l Round Water Tanks

25000 Litre Round Rainwater Tank

25000l Round Water Tanks

5000 Gallon Round Rainwater Tank

5000 Gallon Water Tanks

Round Water Tank Price Lists

For a list of prices on our most popular Round Steel Water Tanks, Filtration Systems & Accessories.
Please click below or contact us.

Round Water Tank Deliveries

On smaller residential properties access for a tank delivery can be difficult. There are a few considerations when working out the size tank for your site. You will need to measure access heights and widths to make sure we can get your tank to the prepared base.

Generally the tank will be rolled [on protective mattresses] at your property and the height clearance required for access will need to be greater than the diameter of the tank ordered, and the width clearance required for access will need to be greater than the height of the tank ordered. When there are no restrictions you can choose the tank[s] to best suit your needs.

You can even interconnect a series of tanks to maximise your water storage. The round style tanks are the most economical to manufacture, as they do not need the internal rodding the slimline tanks have.

2 Round Rainwater Tanks
Round Rainwater Tank

With the classic corrugated finish on the round tanks they are well suited to a range of properties from the modern, contemporary, colonial, beachside, or rustic styles.

Being manufactured from steel the tanks can be made to meet council requirements for firefighting purposes, be incorporated into a whole of house rainwater harvesting system, or to have as your very own water supply in times of need.

Your own harvested water supply is so beneficial if you love to garden, keep your car sparkling or just lower your council water bills. In times of water restrictions, you will still have your own water supply to use for your property, and by lowering the demand on the council or town supply water, you can save some money too.

Rainwater Tank Delivery Service

Select Water Tanks can deliver your water tank to your door. For all Brisbane & Surrounding Areas that are within 50km of our South Brisbane Factory our Delivery Fees are $180 for Standard & $220 for Oversized Loads. For distances further than 50km please refer to our latest service delivery fees below.

Round Rainwater Tanks Best Materials

Select Water Tanks make steel water tanks that are longer lasting, better looking, healthier, and can be custom made in terms of shape and size. They can be made from either grade 304, marine grade 316 stainless steel.

316 Grade Stainless Steel

Grade 316 Stainless Steel is a metal alloy, made up of steel mixed with elements such as chromium, nickel, molybdenum, silicon, aluminum, and carbon. Iron mixed with carbon to produce steel is the main component of stainless steel. Chromium is added to make it resistant to rust.

Water tanks made from Grade 316 are perfect for sea-side environments.  They can be easily cleaned, resists organic chemicals, and a wide variety of inorganic chemicals.

Here’s a tip!  Fresh water and air react with the chromium oxide compound that forms a passive layer over the steel,  if damaged the passive film reconstitutes itself. So make sure you give your 316 Stainless Steel water tank an occasional rinse with rainwater.

304 Grade Stainless Steel

Grade 304 stainless steel is generally regarded as the most common austenitic stainless steel. It contains high nickel content that is typically between 8 and 10.5 percent by weight and a high amount of chromium at approximately 18 to 20 percent by weight. Other major alloying elements include manganese, silicon, and carbon. The remainder of the chemical composition is primarily iron. In most applications the steel is used where its corrosion resistance gives long lasting appearance and service life. The ease of cleaning and of maintaining a hygienic surface on the steel make it excellent for many purposes.

Our 304 Grade is a good choice if you live inland away from the salt corrosive sea.

Colorbond Steel

Colorbond Water Tanks offer great value for money for your Brisbane home. They are built in the classic corrugated finish and come in a range of colours that can be matched or contrasted to your existing colour scheme.

Colorbond Water Tanks have a 20 year non corrosion warranty and a 10 year manufacturers warranty, and are an economical choice for your water tank. Being made from steel, they are built to withstand Australia’s harsh conditions and they will maintain structural integrity in the event of a bushfire, which makes them a good choice for firefighting tanks. We can custom build to your requirements to meet your council’s regulations for bushfire overlays.

Round Rainwater Tanks FAQs

Are rainwater tanks worth it?

Rain can be harvested from your roof for example, instead of flowing away from your property, via a pipe from the gutters for example into the top of the tank via an inlet strainer. If you approximate the cost of the tank as say $2500 and it is serviceable for over 30 years, then the cost is well less than $2.00 per week to provide water to your household, your stock, your crops or your lawn and/or garden.

Why stainless steel?

There are many reasons you should consider buying a stainless steel water tank.

They include:

  • They come with a 30-year warranty for corrosion and so are cost-effective over time.
  • The minerals used in stainless steel are valuable and so can be recovered and recycled.
  • They are being designed into structures by builders and architects because they look good.
  • University research shows they hold their structural integrity during a bush fire.
  • Stainless steel keeps the water cool which helps reduce the growth of bacteria and algae.
  • Stainless steel does not leech impurities into the water which makes it hygienic to drink.
Do you connect the tanks up?

No. We suggest you get a local plumber to connect them up. That way you have a local expert to make them compliant to local conditions.

Does Stainless Steel Cost More?

On average, round stainless steel tanks made from Premium grade 304 stainless steel are approximately $500 to $1000 more than the equivalent tanks made from Aquaplate/Colorbond.

For example, a 10,000 litre round tank made from stainless steel is approximately $1600 whereas a similar one made from Aquaplate/Colorbond is approximately $1000.

The price differential is slightly more for slimline tanks because of the inclusion of internal stainless-steel rods to strengthen the slimline shape of the tanks.

The price differential is also greater if Marine grade 316 stainless steel is used to construct the tanks.

For more information on pricing see our example price lists .

What other fittings are available?

There are a wide range of additional fittings we can provide. One example is we can install a bucket height tap on the side of your tank.

Are the tanks resistant to bush fires?

Yes. University research shows that both Stainless steel and Aquaplate/Colorbond tanks maintain their structural integrity during bushfires.

How do I work out the size of tank I need?

Normally we recommend that you get the largest size tank you can to suit your site. Round tanks can be made to much larger sizes whereas slimline tanks can be made specifically to fit neatly into a confined space.

Deciding a size can be influenced by a number of factors. These include:

  • The number of people living in a house if it is for domestic use
  • The catchment area of the roof
  • The annual rainfall

For more information visit our “Custom Shapes & Sizes Section”

Why Aquaplate / Colorbond?

Aquaplate/Colorbond tanks are slightly less expensive than ones made from stainless steel and they come in a range of colours to match or compliment existing structures or colour schemes. These tanks come with a 20-year warranty for corrosion and a 10 year manufacturers warranty. Research has shown, that they keep their structural integrity during a bush fire.

Do the tanks meet Council Overlay requirements?

Yes we can build the tanks to meet specific Council Overlay requirements.

What fittings come with the tank?

Three fittings come with your tank. You will be asked where on each tank you want them.

They are:

  • A 400mm inlet strainer with light guard which allows the water from your roof for example, into the tank, with protection from the sunlight and mosquitoes.
  • An overflow attachment which is a round plastic outlet which can be either 90 or 100mm in diameter and which come with mosquito proofing.
  • A 25mm outlet with a ball valve located at the bottom of your tank.
Can the tanks be made to be fire-fighting compliant?

Yes we can fit the tanks with the required fittings to make them firefighting compliant,  with a Storz fitting for NSW or the Camlock for Qld.

One particularly efficient tank we can build is where the normal outlet system is built a certain distance up the side of the tank so that you always have 10,000 litres in the bottom section of the tank in case of fires, while still using the water in the top of the tank for normal use.

Lisa Hagean

Select Water Tanks Google Review Lisa Hagean 

"I recently ordered a 7500 litre stainless steel round tank from Select Water Tanks and couldn't be happier with it. The process from order to delivery was perfect and I was kept in the loop with manufacture times and a set delivery date. Communication was great through the process and I had to change the delivery date to suit me and there was no issue with this.."

Gary Turner

Select Water Tanks Google Review Gary Turner 

"A big thank you to Jason, Linda, Loyd, Damon and the team at Select Watertanks.The whole process ran on time, in fact you were able to deliver all our tanks prior to Christmas.The boys did a great job negotiating our tricky block and setting up the tanks.We highly recommend Select Watertanks"

Paul Inglis


"The team from Select Water Tanks were superb. The way they handled my new tank was especially careful and thorough. It was great watch them take it down a hill and locate on the site. Highly recommended for good product, service and interest in the customers needs."

Barbara Geitz

Select Water Tanks Google Review Barbra Geitz 

"We have just bought 3 tanks and have now installed them. We found Select Tanks very easy to work with right through to delivery. We had to change the delivery date on a number of occasions and it was never a problem. We are very happy with the quality of the tanks which look great."

More Than Just a Manufacturer of Steel Rainwater Tanks

Select Water Tanks custom make round & slimline water tanks that are longer lasting, better looking, healthier, & better for the environment. They can be made from either grade 304, marine grade 316 stainless steel or colorbond steel.

Tailored Solutions

We find the perfect solution for your rainwater harvesting system needs.

Quality Guaranteed

Highest quality Stainless steel water tanks backed by 30 years non corrosion warranty. Our Colorbond Tanks are backed by 20-years non corrosion warranty.

Industry Leading

We are the first Australian company to design and manufacture stainless steel water tanks.

Looking for Help or Advice?

If you need any help with Steel Water Tank Pricing, Custom Sizing, Delivery Charges or anything else
Please contact us today - we are here to help.