Custom Sized Water Tanks

Custom Sized Water Tanks – Made from Stainless Steel & Genuine Colorbond / AQUAPLATE® Material | Huge ranges in Slimline, Round, Jumbo | Factory Direct Prices.

Please note: not all dimension combinations are available


Custom Sized Water Tanks


Round, Slimline

Material Options

304 Grade Stainless Steel, 316 Marine Grade Stainless Steel, Colorbond / AQUAPLATE®

Custom Sized Water Tanks matched to your needs
We specialise in creating custom water tanks to perfectly match your unique needs, offering a wide range of sizes from 190 litres to 29,800 litres for round tanks and 150 litres to 8,523 litres for slimline tanks. Our tanks are not only tailored in size but also in the placement of fittings, allowing you to have them precisely where you require, such as taps, outlets, or firefighting fittings.

Whether you’re dealing with sloping terrain, limited space, or specific challenges, we’re dedicated to finding the ideal water storage solution for you, ensuring that each tank is meticulously crafted to your specifications and requirements. Custom sized water tanks is what we do best

All Our Steel Water Tanks Come with Three Standard Inclusions. Upon ordering your tank(s) you will be asked to place on a diagram where you want the fittings located.

  • Inlet Strainer 400 mm
  • Mosquito-proof overflow 90/100 mm
  • 25mm outlet with a tested Ball value

Water Tank Delivery

Select Water Tanks will make sure your new water tank is delivered and positioned correctly on your base. We can also assist and coordinate with a crane operator if required. We use delivery zones to provide an estimate on your delivery costs.

Estimated Water Tank Delivery Fees

What is O Size? Tanks 2.6m high or round tanks with a 3.7m diameter create an oversize load when transported on the road.

Distance Standard O Size
0-50km $180 $220

For distances further than 50km please calculate your distance from our factory below and contact us for a quote.

Generate Your Quote Below

Use the fields below to generate a full quote request. If you are not sure with any of these - just select “Not Sure” and we can confirm with you once we finalise your order

Additional Fittings

Best practice for larger tanks is to also include a High suction (HS) fitting. This is a 50mm outlet and ball valve installed on the corrugation above. This allows for efficient water balancing when other tanks are connected. The HS Fitting also protects the pumps and internal water appliances as it draws only clean water from above the sludge / anaerobic level.

You may also wish to purchase a Bucket Height Tap for example, where the tap is placed high enough from the base, to allow gravity feed of water, into a bucket placed under the tap.

Additional Outlets Stainless Steel

If you require any additional outlets for your stainless steel tank please add them below.

Additional Outlets Colorbond

If you require any additional outlets for your Colorbond tank please add them below.

Pay a deposit of 20% per item

Custom Sized Water Tanks – 1000’s of Sizes Available

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.

Custom Made Round Water Tanks

We can build our round rainwater tanks with a capacity from as little as 190 litres to a huge 29,800 litres, with diameters from as little as 900mm to 3700mm wide, and heights from 300mm to 3100mm tall.

Our slimline water tank options range in capacity from 150 litres to 8,523 litres, which have widths from 550mm to 1150mm wide, lengths from 1000mm to 4000mm long, and heights from 300mm to 2350mm tall.

Custom Sized Water Tanks - Round Options
Custom Sized Water Tanks - Slimline Options

Custom Made Slimline Water Tanks

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.

Custom Sized Water tanks - Jumbo Slimline
Jumbo Stainless Slimline

This customer needed custom water tank to hold 8,523 litres on a long skinny block in Paddington.

Custom Sized Water tanks - Under Deck
Under The Deck

Custom sized under deck tanks are perfect for sloping sites.

Custom Sized Water tanks - Commercial
Commercial Water Tanks

Custom water tanks for industry with commercial fittings.

Custom Sized Water tanks - space saving Commercial
Space Saving

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