Custom Water Tanks

Custom sized Steel water tanks look great, last longer, heathier, bushfire resistant & recyclable
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Custom Water Tanks

Custom water tanks is what we do and we have thousands different sizes available to suit your requirements. We make every tank to order which gives our customers the best possible chance of being able to get the water storage they need and made to their specifications.


We understand that different sites have different rainwater harvesting challenges. Sloping blocks might require a series of water tanks at different heights so they will balance / equalise properly.

A low set house on a large property might require squat tanks with a large diameter and low inlet height. You may have the space for a huge round water tank or be confined by having a narrow position for a slimline water tank. Whatever the challenges we will help find you the perfect solution.

Jumbo Stainless Slimline

This customer needed custom water tank to hold 10,000 litres on a long skinny block in Paddington.

Under The Deck

Custom sized under deck tanks are perfect for sloping sites.

Commercial Water Tanks

Custom water tanks for industry with commercial fittings.

Space Saving

Custom Colorbond Slimline Water Tanks are perfect for wash bays in high traffic areas.

Need Help with Pricing?

For a full list and breakdown on pricing for all Our Steel Water Tanks, Filtration Systems & Accessories.
Please click below or contact us.

Custom Water Tanks in Different Styles

We can build our round rainwater tanks with a capacity from as little as 190 litres to a huge 37,000 litres, with diameters from as little as 900mm to 3900mm wide, and heights from 300mm to 3100mm tall.

Our slimline water tank options range in capacity from 150 litres to 10,000 litres, which have widths from 550mm to 1150mm wide, lengths from 1000mm to 4800mm long, and heights from 300mm to 2350mm tall.

Custom water Tanks - Jumbo Round
Custom Water Tanks Slimline

Not only are the sizes made to your requirements, but we also put the required fittings where you want them too. We can fit additional fittings to your tank[s] as required, like a bucket height tap, larger sized or additional outlets and ball valves, firefighting fittings or larger sized or additional inlet strainers with light guards.

If you are trying to fit a tank under your deck, along a narrow side of your property or need a series of tanks along your shed, talk to us to see what is possible.

What Our Customers Say

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.

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.

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.