engineered poly products

Simply The Best Approved Septic Tanks. Ever.


COERCO septic tanks are manufactured through one-piece moulding. This ensures that they are exceptionally strong, durable and reliable, with no joins or weak points in their construction.

Built from polyethylene, these septic tanks are lightweight, resilient, and super flexible for ease of transportation and many say they are the easiest septic tanks to install when compared to the more traditional options available such as concrete.

These are fast becoming the first choice all over Australia for septic tanks because of the unmatched value and benefits they bring to the consumer.

Poly Septic Tank Certification


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

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Choose a poly septic tank or leach drain system from COERCO and benefit from high-quality products, easy installation and superior customer service.

Talk to our friendly team today for expert advice and a no-obligation quotation.

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The Highest Rated Poly Products Manufacturer... By Customer Reviews!

" 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 concrete tanks which were much heavier and needed machinery to lift them. We generally needed two concrete tanks compared to the one poly tank with a baffle which we now use as standard. This means we can install them faster, with less work, and less digging. We find the sales staff at Coerco to be very helpful, knowledgeable, quick to act, and professional in every respect. I would certainly recommend Coerco as a company. "

Andrew Sharpe - Stallion Homes, Northam, WA

" As an agent for Coerco they are so easy to deal with making it even easier for the customers. Nothing is an issue for them. "

Craig Bassett - Elders Ltd, Geraldton, WA

" Fantastic Experience. The service was 10 out of 10, and the process was seamless from quote through to delivery. Was even more impressed after getting an after sales follow up call to make sure I was happy. "

Darren Tindal, Albany, WA

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

Frank The Sheepdog, Katanning, WA