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Save Money and Water With A Stainless Steel Water Tank

Steel water tanks are an iconic Australian product – a true feature of the rural landscape, and if we go back far enough, urban areas.

Today, a new generation of environmentally-aware water tank buyers are looking for modern versions of the classic steel water tank. And they don’t just want the original galvanised finish. Modern homes may be better suited to colourful tanks matched to their decor, or even modern slimline tanks where space is a problem.

metal-tank-slimlineAs always, we looked for quality suppliers. We needed one who could supply large rural and industrial tanks all around Australia, and another who could supply our customers with normal-size metal tanks in Brisbane, Sydney, Canberra and Melbourne.

Of course, we not only looked for quality, we also looked for competitive pricing and (call us old-fashioned), businesses that were likely to be around to honour the warranties they give!

Quite a few suppliers failed to make the grade. Happily, two suppliers really stood out–Rhino Tanks for the rural/industrial large metal tanks, and Tankworks Australia for round and slimline metal tanks, primarily for domestic use.

Tankworks Australia by Kingspan

steel-tanks-truckEstablished in 1934 in Sydney as Parramatta Tank Works, Tankworks Australia has been continuously manufacturing corrugated steel water tanks since then.

Today, Tankworks Australia has grown to be a leading name in the industry, and is your assurance of a precision engineered metal water tank backed by a long term warranty. It has since been acquired by Kingspan, and the original vision and quality have only increased as a result. 

Here are some reasons why people love Tankworks water tanks:

  • Strength Of Steel: Steel tanks do not bulge or stretch when full. The strength of steel means the tanks comfortably hold the large forces generated by tonnes of water. Steel tanks have been around for more than 100 years so the structural long life is a proven fact. In addition this strength will not deteriorate over time under the harsh Australian sun as with other materials.
  • Long Life: In the early days steel tanks were just plain galvanised steel and after many years could begin to rust from the inside. This is a thing of the past with modern tank steel which has a long life polymer coating. This polymer coating is on the inside of the tank walls and on both sides of the base (inside and out). The water never touches the steel and now the metal tanks carry a 20 year warranty against corrosion! The strength of steel and the longevity of polymer coating… the best of both worlds.
  • Style And Elegance: The steel water tank not only looks traditional and Australian, but it is less bulky than other alternatives. This is especially noticeable in the slimline format where polyethylene tanks typically are much larger for the same capacity due to moulded cross strengthen taking away from storage capacity. The same applies for the round metal tanks where the flatter roof structure means more water right to the top of the tank compared to the unused air gap in the domed roofed poly tanks.
  • In particular, Tankwork’s Evolution II Rainwater Harvesting System has become a fast favorite.

Slimline Metal Tank Range

Square Metal Water Tanks – MAXIMUM litres per square meter- and great for corner positions!


Our Standard Round Metal Water Tanks


Rhino Domestic, Rural, Industrial and Commercial Zincalume® & Colorbond® Water Storage Tanks

rhino-large-metal-tankNeed a LARGE water tank from 36,000 litres to 2,000,000 litres? We’re proud to offer the Rhino range of metal tanks across Australia. As always, we looked for a well-established company, with good quality products and providing excellent value for money. Rhino Tanks was the obvious choice. Why?

  • Rhino tanks have been in business almost 20 years.
  • A family-owned company, they understand the customers’ needs- senior managers have actually installed tanks themselves!
  • Quality control is vital at Rhino tanks, and they control every aspect of manufacture and supply- they manufacture the tank, make their own liners, then deliver and instal the tank for you.
  • Rhino offer superior fittings and accessories, including magnesium sacrificial anodes, TWO 50 mm outlets, large 100 mm overflow, heavy-duty lockable access hatches and removable internal/external galvanised ladders
  • Rhino tanks and liners are guaranteed for 20 years
  • Your Rhino water tank is available in Zincalume®, or a range of 17 Colorbond® colours.

Quality and Strength

All Rhino Water Tanks are made from genuine Bluescope® COLORBOND® or Zincalume steel with a corrugated profile, which provides incredible wall strength and durability. Strength is a feature, using 250mm overlap and 200mm double bolt spacing. Quality fittings and 12mm bolts, hot dipped galvanized and corrosion resistant.


All tank liners are made in the Rhino Tanks manufacturing factory and have been for over 15 years. Our specially trained liner fabricators use the latest welding techniques and state of the art machinery to produce liners of the highest quality. With no third party involved, it means we can control the quality of the whole product from start to finish.

The liner material has been selected on its strength, durability and life expectancy, not on price. The material is a quality reinforced multi-layered fabric which is laminated with polyethylene. Polyethylene is a very stable food grade material that complies with International and Australian Standards for drinking water. The material will not taste, stretch, shrink or crack.


Rhino Tanks are GUARANTEED FOR 20 YEARS. Every 5 years a Rhino Tanks’ service agent will inspect your tank and replace the Sacrificial Magnesium Anodes around the bottom of the tank.

So, you can see why Rhino Tanks are your #1 choice for anything rural!

DIY Rainwater Tank Cleaning and Maintenance

In general your water tank requires very little maintenance to keep it working well and looking good. Here are some helpful hints in caring for your tank.

1. Regularly Clean The Inlet Leaf Strainer

This is a fine stainless steel mesh about the same size as your typical fly screen. The water passes through this strainer as it enters you tank and is located on the top of your tank. This strainer should be cleaned regularly to ensure it does not become blocked.

2. Remove Debris from Tank Lid

It is a good idea to keep leaf build-up and sticks etc off the lid of your tank. These can build up over time and add weight to the lid of your tank and also stain its appearance. Pot plants or other items should not be placed on the top of your tank.

3. Clean the External Surfaces of the Tank

While not necessary to clean the outside of your tank the occasional hose off (with rainwater of course) is recommended to keep you tank looking at its best. This removes dust and dirt build up. Ensure you keep debris build up away from the base/wall of your tank. Don’t allow dirt build up around the bottom lip.

4. Inspect and Clean the Water Tank Base Area

The most important aspect of your tank setup is its base. Inspect the base area every 6 months checking for any movement or damage to the slab or pavers. If the base begins to move or crack etc., immediately empty the tank to remove the weight and have the fault corrected to prevent damage to the tank. Remember that there is no warranty for the tank if the base has failed. All tanks must be fully supported by a flat and level base.

5. Remove Sediment Build Up Inside

Over time your tank will build up a sediment layer on the bottom of the tank which is normal. This layer build up is dust that settles out of the water which has run off your roof and gutters. It is harmless and natural and should not be disturbed or removed until the build up reaches the tank outlet or approx 20 mm thick. This will take many years depending on the location and environment. There are professional tank cleaning companies who will come and clean this sediment layer out for you. Another option is to wait for your tank to be empty and then open the bottom valve (disconnect from your pump if you have a pump installed) and with a hose through the removed inlet strainer you can stir up the sediment and allow it to run out. This will not do a 100% job but will remove most of the build up. You can also reduce the amount of material entering the tank by using a first flush diverter.

6. Treat Smelly Water (caution if your water is for drinking)

Some customers who have a lot of leaves in their gutters can sometimes have a smell from their tank. This is best dealt with by first ensuring the gutter and leaf strainer are clean and then by placing a small amount of chlorine in the tank to kill off the bacteria causing the smell. Best to use the tablets from a pool supplier but ensure you check with them the recommended dosage depending on your tank capacity. The chlorine will disinfect the water and then after a week or so most will be evaporated out of the water. If you tank is for drinking purposes this procedure is not recommended.

7. Treat Water for Mosquitoes

Most mozzies or wrigglers make their way into your tank from first breading in your sagging and leaf clogged gutters. They wash down the downpipe and are small enough to pass through the inlet strainer and into your tank. To treat your tank for this problem use the same method as described in smelly water above.

We hope these tips help you get greater life, and better use out of your water tanks.

Steel Water Tanks Colorbond® Colours Range

If your new metal water tank is available with Colorbond colours and finishes, there are several different colours you can choose from.



Getting Ready For Your Large Steel Tank Delivery

 If you will be purchasing a large steel water tank, there are a handful of things that need to be done in preparation of the delivery.

These are things that are your responsibility, and you will need to take care of them (or at least make separate arrangements for others to).

1. Pad Preparation

It is the customer’s responsibility to prepare a level pad of sand or crusher dust. Typically the pad should be 150mm deep at the specified diameter.


2. Water Supply

It is also the customer’s responsibility to provide a water supply for the tank (at least 10% of the total capacity) upon completion.

Yes, that IS all you need to do. Rhino Tanks staff will deliver and install the tank for you.

Want to Custom Design Your Own Tank? 

If the standard tank sizes above don’t suit your needs, then why not design your own? Pick the depth, width, diameter, height of the tank that meets YOUR needs- not the manufacturer’s.

You can custom design your tank up to 29,000 litres!


Don’t forget to look at the raised gaden beds made to match your Tankworks tank…