ISO9001

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 site 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 farmers of Western Australia, COERCO are the industry experts, with the skills and knowledge to produce high-quality products at unbeatable prices.

Polyethylene water tanks are a great choice:

  • One-piece construction ensures no weak spots
  • Underground design offers greater flexibility on where you site your tank
  • Sealed lid for additional safety
  • 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
  • Pump draining options available
  • Lightweight and easy to transport and install
  • Unbeatable quality and value for money

Learn More About Our Products

Click on one of the products below to read more about the specific benefits of our underground water tanks:

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Find Out How We Can Help

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!

Book your discovery meeting today and let us show you how our solutions can benefit your operations.

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Delivering Proven And Trusted Solutions To The Commercial & Environmental Industry

" Thankyou Coerco! Excellent Quality product (2200 litre septic + leach kit) with prompt delivery. A very minor fault in the leach kit was rectified ... Read More

Marcus McGregor
Albany, WA

" We have been very happy with the polyethylene septic tanks provided by Coerco, and we now use these as standard on all our new homes. Previously we used ... Read More

Andrew Sharpe
Northam, WA

" Prompt delivery, quality product, good advice. Water tank and septic system. "

Frank The Sheepdog
Katanning, WA

" Extra special thanks to the team at “Coerco”. I bought a full septic system and leach drains from them for my 40 acre property in Gingin. I can’t speak any ... Read More

Sarah Kelly
Gingin, WA

" We regularly deal with Coerco for tanks, leach drains and a range of other products. I find them to be easy to deal with, helpful, quick to respond to ... Read More

Rob Hales
Bullsbrook , WA

" Whilst proceeding through a home upgrade, we were directed to upgrade our 2 tank septic system by our Council’s Health Dep’t. One of their recommendations ... Read More

David Couch
Mary Brook, WA

" Exceptional service from the first enquiry to the above and beyond delivery service the company achieves. They make choosing a tank supplier a simple answer! ...

Grant Oliver
WA

" Installed tank near WA/SA border. Coerco managed their supply and delivery logistics professionally. No stress for me. Thank you Adam and Craig. "

Stephen Hoschke
Mt Lawley, WA

" We took delivery of 4 x 50KL commercial water tanks from Coerco this week. Coerco are fantastic for us to deal with when we build in rural settings. Their ... Read More

Moritz Kurys-Romer
Willyabrup, WA

" Exceptional products meeting all the Australian standards. Excellent service too, from design to supply. Well done guys! "

Mavondo Abel Hlophe
Malaga, WA

" Good to deal with prompt service and really good communication. Delivery service spot on! "

Clinton Smith, Perenjori
WA

" Coerco have always been our go-to supplier for polytanks. Good quality tanks. We've requested to customise the tank fittings and were executed well. Great ... Read More

Jerica Marise Razon
Malaga, WA

" Purchasing a water tank for the Kendenup fire brigade, I received excellent service from all members of the Coerco group with whom I liaised. They have a ... Read More

Brian Appleby
Kendenup, WA

" Great Customer service, awesome deliveries and outstanding product range! Always a pleasure working with such a professional team! "

Mik Dob
Kalgoorlie, WA