Are you looking for a slimline poly rainwater tank?

Authorized Distributor of THIN TANKS based in PERTH Western Australia and delivering Australia wide

Scroll down for the full Thin Tanks range. See Perth WA prices and dimensions as well as the available colours

Welcome to Slim Thin Tanks

Water is a precious resource that we can't afford to waste!

The most advanced space saving tanks on the market today
with the added bonus of the Thin Pots Vertical Garden
Clean & healthy benefits
Our Full Range of Thin Tanks
500L tank is now available in WA
The 4000L Thin Tank
The largest tank in our range
Series 2 the NEW 1000L Thin Tank
now with 25mm brass outlets
New 500 Litre Thin Tank
The smallest in the range
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We specialize in the supply of slimline poly rainwater tanks for urban properties. Our specific range is most suited for homes with limited space

Slimline Poly Rainwater Tanks that fit into the narrowest spaces!

Tanks that look great!

We can supply and deliver a slimline poly rainwater tank, or we can provide a full rainwater harvesting system that suits your requirements

The Thin Tanks Range

NEW! 500 Litre Thin Tank

Length: 1200mm
Height: 1200mm
Width: 400mm
Weight: 50kg


NEW! 1000 Litre Series 2 Thin Tank

Length: 2400mm
Width: 260mm
Weight: 95kg

1000 litre slimline poly rainwater tank

1000 Litre "Original" Thin Tank

Length: 2400mm
Width: 260mm
Weight: 75kg

1333 litre slimline poly rainwater tank

1333 Litre "Fat" Thin Tank

Length: 1012mm
Height: 1950mm
Width: 750mm
Weight: 95kg

2000 Litre Series 2 Thin Tank

Length: 2400mm
Height: 1970mm
Width: 470mm
Weight: 135kg

2000 litre "fat" slimline poly rainwater tank

2000 Litre "Fat" Thin Tank

Length: 1500mm
Height: 1950mm
Width: 750mm
Weight: 135kg

3000 Litre Series 2 Thin Tank

Length: 2980mm
Height: 1970mm
Width: 580mm
Weight: 175kg

4000 litre slimline poly rainwater tank

4000 Litre Thin Tank

Length: 2980mm
Height: 1970mm
Width: 750mm
Weight: 200kg

Thin Tanks Colour Chart

Our slimline poly water tanks provide minimum intrusion onto your property

Thin Tanks can be free standing or joined together to form a partition or a fence.

Use any number of Thin Tanks to achieve the desired capacity.

Designed for easy installation & space saving, ThinTanks™ Slimline Rainwater Tanks are the thinnest available water tank for any capacity. On the forefront of ground-breaking technology, the Adelaide-made ThinTanks™ range of rainwater storage tanks has been developed for space-saving water conservation across both residential and commercial applications.

ThinTanks are an excellent solution for installing in much smaller areas, such as courtyards and any other residential or business properties with limited space available. Without impeding on access or aesthetic appearances, you can position the water tank against a wall or as a stand-alone structure.

Thintanks™are an Australian made product, manufactured in South Australia, New Zealand and South Africa from food grade, 100% UV stabilised polyethylene.

All Thintanks™ are designed by a professional consulting engineer in accordance with all AS/NZ Standards and designs confirmed with FEA testing.

The solid one – piece constructed Thintank™ is fitted with two (2) brass 25mm outlets at the bottom of the tank allowing for easy linking of tanks.

A 90mm overflow flange is provided that can be fitted to either end of the tank [needs to be cut out with a 95mm hole saw].

“Rainwater Harvesting is rainwater captured from a roof into a container and is the 3rd largest source of water in Australia.”

“Rainwater harvesting is the first and most efficient element of an integrated water management system.”


Start today! A small tank can be plumbed into your toilet and washing machine saving over 20,000L of water a year. Rainwater harvesting can also help reduce stormwater management costs.

Be waterwise and call us to see what we can do for you!

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