Underground Water Tanks -
Out Of Sight But Instantly Accessible

COERCO’s range of underground water storage tanks offers great flexibility for farmers lacking the space on-site for a traditional tank. With easy access for filling and pumping, our simple operation is a neat solution to the issue of collecting and storing water.


Coerco — Reliability in an unpredictable world

The Complete Package For Storing Water Underground

Looking for an innovative way to collect and store valuable water without taking up additional floor space? Our range of polyethylene underground storage tanks have all the benefits of a traditional tank and can be installed to be completely out of sight on your property.

Thanks to our in-house polyethylene processing facility, COERCO is the only manufacturer to retain internal control of quality from start to finish. We’re proud to be an ISO9001:2015 certified company, highlighting our commitment to outstanding workmanship across all our products.

With a 25 year history in supplying water storage products to the people of Australia, COERCO is the industry expert with the skills and knowledge to produce high-quality products at unbeatable prices.

Polyethylene underground water tanks are a great choice:

  • One-piece construction ensures no weak spots
  • Underground design offers greater flexibility on where you site your tank
  • UV stabilised to withstand the harsh Australian climate
  • Manufactured in accordance with Australian standards
  • Made using the best linear low-density food grade polyethylene
  • Available in a wide range of sizes to suit all applications
  • Comes as a complete set with all required accessories and installation guide
  • Lightweight and easy to transport and install
  • Unbeatable quality and value for money


Learn More About Our Products

Click on each underground water tank below to learn more about product specific details:

3,500 Litre Underground Water Tank including Lid



4,000 Litre Underground Water Tank including Lid



7,000 Litre Underground Water Tank including Lid



11,000 Litre Underground Water Tank including Lid



15,000 Litre Underground Water Tank including Lid



19,000 Litre Underground Water Tank including Lid



23,000 Litre Underground Water Tank including Lid



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12 Critical Mistakes People make When Ordering Water Tanks!

  • Choosing the wrong size of water tank
  • Not sizing your tank to match your gutter
  • Ignoring specific details involved in installation
  • Not checking the external protection capabilities of the water tank

Ready To Get A Quote?

From a single small-capacity tank to a more complex system, we'll provide you with expert advice and a no-obligation quotation free of charge!


Get in touch with our friendly team of experts today.

Craig Whyte

Sales Consultant


Ready To Get A Quote?