High-Quality Septic Systems Guaranteed to Endure the Harshest Environments

COERCO’s light-weight, industrial-strength septic systems are the preferred choice for commercial and environmental projects all over Australia. The durability and effectiveness of our septic tank systems are second to none.

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All Your Waste Management Needs Covered

With a 25-year history in supplying liquid storage products to the mining and civil construction industry in Western Australia, COERCO is the industry expert with the skills and knowledge to produce high-quality products and solutions which minimise the risk of losses and downtimes through failure and poor support.

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.

Typical waste water management systems fall into one of two main categories:

1. Septic Tanks: easily adaptable to suit any environment, and available in a wide range of capacities, your waste management is made simple with a high-quality polyethylene septic tank from Coerco. These are supplied as a full kit including everything you need for installation.

2. Leach Drains: designed to work alongside Coerco septic tanks or as a standalone system, our leach drain products are modular, and are supplied as flat pack items. This makes it easy for you to create the exact setup you need. Our range of leach drains are a simple and cost-effective waste water management solution.

Every project we undertake is carried out in accordance with all relevant Australian standards. COERCO is an ISO9001:2015 certified company. Whether you’re investing in one of our standard products or working with us to implement a custom-designed solution specific to your site and setup, you will always receive the highest standards of quality and attention to detail.

Learn More About Our Products

Click on one of the categories below to read more about the specific benefits of our septic tanks and leach drain systems:

septic tanks

leach drain systems

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Effective Solutions For All Your Working Needs

Ready to learn more about how Coerco can save you time and money at work? Our extensive range of products and expert team of engineers are ready and waiting to talk to you about your requirements, and how we can revolutionise your everyday operations.

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Delivering Proven And Trusted Solutions To The Commercial & Environmental Industry

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.. Read More.

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. Read Less

Andrew Sharpe - Stallion Homes

Northam, WA

Had two tanks delivered recently. Great company to deal with! Go out of their way to make sure you’re happy with your purchase. Delivery guys are.. Read More.

Had two tanks delivered recently. Great company to deal with! Go out of their way to make sure you’re happy with your purchase. Delivery guys are awesome, can’t do enough for you. Read Less

Angela Clifton

Beermullah, 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.. Read More.

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 was to use a baffled 4000ltr poly tank and specifically mentioned an SEP4000 by Coerco. I researched the product online then called Craig at Coerco because the tank had to be located in a trafficable area. Craig was very helpful and sent several emails outlining how to install the tank and lid. Both my plumber and staff at Reece Plumbing had no idea that a trafficable lid was available for these tanks. Encouraged by Craig’s advice I ordered both items and received courteous notification of the expected arrival. The delivery driver was punctual, polite and efficient and we quickly unloaded the tank. I expected the lid to be heavy concrete like those on my existing two tanks but was quite surprised to find it is made from hard plastic, honeycomb like panels that interlock and are stiffened by inserting 20 mm poly pipe horizontally through the lid. Once installed above the tank you simply water in sand into the plastic matrix lid and this coversheet is engineered to protect the tank below. The system hasn’t been subjected to a lot of vehicular traffic as yet but I have driven a tractor on it with no problem! Council have passed the new system and it is in use. I would recommend this product from Coerco! Read Less

David Couch

Mary Brook, WA

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.

Thankyou Coerco! Excellent Quality product (2200 litre septic + leach kit) with prompt delivery. A very minor fault in the leach kit was rectified immediately! Courteous and efficient staff! What more could you possibly want? Awesome company to deal with, Great stuff Read Less

Marcus McGregor

Albany, WA

From the moment I placed the order to the time my tank was sitting full in place the whole experience was hassle free. The truck driver Peter was.. Read More.

From the moment I placed the order to the time my tank was sitting full in place the whole experience was hassle free. The truck driver Peter was friendly and capable. Read Less

Ray Morley

Perth, 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.. Read More.

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 higher of them from the people in the office to the delivery. Products are very very good and the people even better. I would highly recommended these guys to anyone chasing the products they stock! You won’t be disappointed. Read Less

Sarah Kelly

Gingin, WA

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

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

Stephen Hoschke

Mt Lawley, WA