Practical And Functional Septic Systems

Coerco offer a range of poly septic tanks to suit every requirement, particularly suitable for the commercial and environmental industries. Our high-quality, one-piece construction tanks and accessories are supremely durable, reliable and cost-effective - the best of their kind in Australia.

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  • Lightweight, easy to transport and install
  • Manufactured from durable polyethylene
  • Anti floatation ring and ribbing incorporated into design
  • Certified to Australia Standard AS/NZS1456.1 and approved by Department of Health - WA
  • Supplied as complete kit including lid, inlet & outlet "T" pieces
  • Leach Drain systems also available

Poly Septic Tank Certifications

}', 11='{type=string, value=[{"CODE":"SEP-1450"},{"Diameter (mm)":"1250"},{"Height (mm)":"1500"},{"Capacity (Litres)":"1450"}]}', 14='{type=option, value={id=1, name='Yes', order=0}}', 15='{type=option, value={id=1, name='Yes', order=0}}', 16='{type=number, value=1}', 17='{type=option, value={id=2, name='No', order=1}}'}, {id=37080444500, createdAt=1604471893029, updatedAt=1631670584570, path='sep-2200', name='2,200 Litre Septic Tank |Coerco| Australia', 1='{type=string, value=2200 Litre Septic Tank}', 2='{type=string, value=COERCO offers certified 2200 Ltr Septic Tank with anti-flotation ring, durable poly, and easy to install fittings. Made to last long term. }', 3='{type=string, value= SEP-2200}', 4='{type=string, value=2200 Litre Septic Tank}', 5='{type=string, value=2,200ltr Septic Tank (1540D x 1500H)}', 6='{type=option, value={id=10, name='Septic Systems', order=9}}', 7='{type=option, value={id=43, name='Septic Tanks', order=43}}', 8='{type=image, value=Image{width=null, height=null, url='https://cdn2.hubspot.net/hubfs/2531009/00%20-%20Website%20Product%20Page/Septic%20Systems/SEP2200.png'}}', 9='{type=string, value=
  • Lightweight, easy to transport and install
  • Manufactured from durable polyethylene
  • Anti floatation ring and ribbing incorporated into design
  • Certified to Australia Standard AS/NZS1456.1 and approved by Department of Health - WA
  • Supplied as complete kit including lid, inlet & outlet "T" pieces
  • Leach Drain systems also available

Poly Septic Tank Certifications

}', 11='{type=string, value=[{"CODE":"SEP-2200"},{"Diameter (mm)":"1540"},{"Height (mm)":"1500"},{"Capacity (Litres)":"2200"}]}', 14='{type=option, value={id=1, name='Yes', order=0}}', 15='{type=option, value={id=1, name='Yes', order=0}}', 16='{type=number, value=2}', 17='{type=option, value={id=2, name='No', order=1}}'}, {id=37080444501, createdAt=1604471893031, updatedAt=1631670584585, path='sep-11000', name='11000 Litre Underground Septic Tank', 1='{type=string, value=11000 Litre Underground Septic Tank}', 2='{type=string, value=Australian Made 11000 Ltr Underground Septic Tank}', 3='{type=string, value= SEP-11000}', 4='{type=string, value=11000 Litre Underground Septic Tank}', 5='{type=string, value=11,000Ltr Underground Septic Tank}', 6='{type=option, value={id=10, name='Septic Systems', order=9}}', 7='{type=option, value={id=43, name='Septic Tanks', order=43}}', 8='{type=image, value=Image{width=null, height=null, url='https://f.hubspotusercontent00.net/hubfs/2531009/2020%20Mining%20and%20Civil/Products/septic%20tanks%20and%20leach%20drains/septic-tanks/large-septic-tanks/sep-11000.png'}}', 9='{type=string, value=
  • Manufactured from Durable Polyethylene
  • Engineered Design
  • Chemical and Effluent resistant
  • Lightweight (ease of installation)
  • Various Manhole options
  • Plug & Play with Baffle, Inlet, Outlet &  "T" pieces included
}', 14='{type=option, value={id=1, name='Yes', order=0}}', 15='{type=option, value={id=1, name='Yes', order=0}}', 16='{type=number, value=6}', 17='{type=option, value={id=2, name='No', order=1}}'}, {id=37080444502, createdAt=1604471893034, updatedAt=1631670584590, path='sep-15000', name='15000 Litre Underground Septic Tank', 1='{type=string, value=15000 Litre Underground Septic Tank}', 2='{type=string, value=Australian Made 15000 LtrUnderground Septic Tank}', 3='{type=string, value= SEP-15000}', 4='{type=string, value=15000 Litre Underground Septic Tank}', 5='{type=string, value=15,000 Ltr Underground Septic Tank}', 6='{type=option, value={id=10, name='Septic Systems', order=9}}', 7='{type=option, value={id=43, name='Septic Tanks', order=43}}', 8='{type=image, value=Image{width=null, height=null, url='https://f.hubspotusercontent00.net/hubfs/2531009/2020%20Mining%20and%20Civil/Products/septic%20tanks%20and%20leach%20drains/septic-tanks/large-septic-tanks/urt15000.png'}}', 9='{type=string, value=
  • Manufactured from Durable Polyethylene
  • Engineered Design
  • Chemical and Effluent resistant
  • Lightweight (ease of installation)
  • Various Manhole options
  • Plug & Play with Baffle, Inlet, Outlet &  "T" pieces included

}', 14='{type=option, value={id=1, name='Yes', order=0}}', 15='{type=option, value={id=1, name='Yes', order=0}}', 16='{type=number, value=7}', 17='{type=option, value={id=2, name='No', order=1}}'}, {id=37080444503, createdAt=1604471893037, updatedAt=1631670584595, path='sep-19000', name='19000 Litre Underground Septic Tank', 1='{type=string, value=19000 Litre Underground Septic Tank}', 2='{type=string, value=Australian Made 19000 Ltr Underground Septic Tank}', 3='{type=string, value= SEP-19000}', 4='{type=string, value=19000 Litre Underground Septic Tank}', 5='{type=string, value=19,000Ltr Underground Septic Tank}', 6='{type=option, value={id=10, name='Septic Systems', order=9}}', 7='{type=option, value={id=43, name='Septic Tanks', order=43}}', 8='{type=image, value=Image{width=null, height=null, url='https://f.hubspotusercontent00.net/hubfs/2531009/2020%20Mining%20and%20Civil/Products/septic%20tanks%20and%20leach%20drains/septic-tanks/large-septic-tanks/sep19000.png'}}', 9='{type=string, value=
  • Manufactured from Durable Polyethylene
  • Engineered Design
  • Chemical and Effluent resistant
  • Lightweight (ease of installation)
  • Various Manhole options
  • Plug & Play with Baffle, Inlet, Outlet &  "T" pieces included
}', 14='{type=option, value={id=1, name='Yes', order=0}}', 15='{type=option, value={id=1, name='Yes', order=0}}', 16='{type=number, value=8}', 17='{type=option, value={id=2, name='No', order=1}}'}, {id=37080444504, createdAt=1604471893040, updatedAt=1631670584600, path='sep-23000', name='23000 Litre Underground Septic Tank', 1='{type=string, value=23000 Litre Underground Septic Tank}', 2='{type=string, value=Australian Made 23000 Ltr Underground Septic Tank}', 3='{type=string, value= SEP-23000}', 4='{type=string, value=23000 Litre Underground Septic Tank}', 5='{type=string, value=23,000Ltr Underground Septic Tank}', 6='{type=option, value={id=10, name='Septic Systems', order=9}}', 7='{type=option, value={id=43, name='Septic Tanks', order=43}}', 8='{type=image, value=Image{width=null, height=null, url='https://f.hubspotusercontent00.net/hubfs/2531009/2020%20Mining%20and%20Civil/Products/underground-storage-tank/urt23000.png'}}', 9='{type=string, value=
  • Manufactured from Durable Polyethylene
  • Engineered Design
  • Chemical and Effluent resistant
  • Lightweight (ease of installation)
  • Various Manhole options
  • Plug & Play with Baffle, Inlet, Outlet &  "T" pieces included
}', 14='{type=option, value={id=1, name='Yes', order=0}}', 15='{type=option, value={id=1, name='Yes', order=0}}', 16='{type=number, value=9}', 17='{type=option, value={id=2, name='No', order=1}}'}, {id=37080444505, createdAt=1604471893042, updatedAt=1631670584605, path='sep-27000', name='27000 Litre Underground Septic Tank', 1='{type=string, value=27000 Litre Underground Septic Tank}', 2='{type=string, value=Australian Made 27000 LtrUnderground Septic Tank}', 3='{type=string, value= SEP-27000}', 4='{type=string, value=27000 Litre Underground Septic Tank}', 5='{type=string, value=27,000Ltr Underground Septic Tank}', 6='{type=option, value={id=10, name='Septic Systems', order=9}}', 7='{type=option, value={id=43, name='Septic Tanks', order=43}}', 8='{type=image, value=Image{width=null, height=null, url='https://f.hubspotusercontent00.net/hubfs/2531009/2020%20Mining%20and%20Civil/Products/septic%20tanks%20and%20leach%20drains/septic-tanks/large-septic-tanks/sep27000.png'}}', 9='{type=string, value=
  • Manufactured from Durable Polyethylene
  • Engineered Design
  • Chemical and Effluent resistant
  • Lightweight (ease of installation)
  • Various Manhole options
  • Plug & Play with Baffle, Inlet, Outlet &  "T" pieces included
}', 14='{type=option, value={id=1, name='Yes', order=0}}', 15='{type=option, value={id=1, name='Yes', order=0}}', 16='{type=number, value=10}', 17='{type=option, value={id=2, name='No', order=1}}'}, {id=37080444506, createdAt=1604471893045, updatedAt=1631670584610, path='sep-31000', name='31000 Litre Underground Septic Tank', 1='{type=string, value=31000 Litre Underground Septic Tank}', 2='{type=string, value=Australian Made 31000 Ltr Underground Septic Tank}', 3='{type=string, value= SEP-31000}', 4='{type=string, value=31000 Litre Underground Septic Tank}', 5='{type=string, value=31,000Ltr Underground Septic Tank}', 6='{type=option, value={id=10, name='Septic Systems', order=9}}', 7='{type=option, value={id=43, name='Septic Tanks', order=43}}', 8='{type=image, value=Image{width=null, height=null, url='https://f.hubspotusercontent00.net/hubfs/2531009/2020%20Mining%20and%20Civil/Products/septic%20tanks%20and%20leach%20drains/septic-tanks/large-septic-tanks/sep31000.png'}}', 9='{type=string, value=
  • Manufactured from Durable Polyethylene
  • Engineered Design
  • Chemical and Effluent resistant
  • Lightweight (ease of installation)
  • Various Manhole options
  • Plug & Play with Baffle, Inlet, Outlet &  "T" pieces included
}', 14='{type=option, value={id=1, name='Yes', order=0}}', 15='{type=option, value={id=1, name='Yes', order=0}}', 16='{type=number, value=11}', 17='{type=option, value={id=2, name='No', order=1}}'}, {id=37980406570, createdAt=1604471893029, updatedAt=1631670584575, path='sep-3200', name='3,200 Litre Septic Tank |Coerco| Australia', 1='{type=string, value=3200 Litre Septic Tank}', 2='{type=string, value=COERCO offers certified 3200 Ltr Septic Tank with anti-flotation ring, durable poly, and easy to install fittings. Made to last long term. Read specs here.}', 3='{type=string, value= SEP-3200}', 4='{type=string, value=3200 Litre Septic Tank}', 5='{type=string, value=3,200ltr Septic Tank (2150D x 1745H)}', 6='{type=option, value={id=10, name='Septic Systems', order=9}}', 7='{type=option, value={id=43, name='Septic Tanks', order=43}}', 8='{type=image, value=Image{width=null, height=null, url='https://f.hubspotusercontent00.net/hubfs/2531009/2020%20Mining%20and%20Civil/Products/septic%20tanks%20and%20leach%20drains/septic-tanks/sep3200-sillhouette-1.png'}}', 9='{type=string, value=
  • Lightweight, easy to transport and install
  • Manufactured from durable polyethylene
  • Anti floatation ring and ribbing incorporated into design
  • Certified to Australia Standard AS/NZS1456.1 and approved by Department of Health - WA
  • Supplied as complete kit including lid, inlet & outlet "T" pieces
  • Leach Drain systems also available

Poly Septic Tank Certifications

}', 10='{type=string, value=https://f.hubspotusercontent00.net/hubfs/2531009/2020%20Mining%20and%20Civil/Products/septic%20tanks%20and%20leach%20drains/septic-tanks/sep3200.png}', 11='{type=string, value=[{"CODE":"SEP-3200"},{"Diameter (mm)":"2150"},{"Height (mm)":"1745"},{"Capacity (Litres)":"3200"}]}', 13='{type=string, value=https://f.hubspotusercontent00.net/hubfs/2531009/2020%20Mining%20and%20Civil/Products/septic%20tanks%20and%20leach%20drains/septic-tanks/SEP3200_Final%20New%20Design%20with%20Logo_Rev%203.pdf}', 14='{type=option, value={id=1, name='Yes', order=0}}', 15='{type=option, value={id=1, name='Yes', order=0}}', 16='{type=number, value=3}', 17='{type=option, value={id=2, name='No', order=1}}'}, {id=38002068976, createdAt=1604471893045, updatedAt=1631670584616, path='sep-7000', name='7,000 Litre Underground Septic Tank', 1='{type=string, value=7,000 Litre Underground Septic Tank}', 2='{type=string, value=High-quality, one-piece construction septic tanks. Supremely durable, reliable and cost-effective - the best of their kind in Australia.}', 3='{type=string, value= SEP-7000}', 4='{type=string, value=7,000 Litre Underground Septic Tank}', 5='{type=string, value=7,000 Litre Underground Septic Tank}', 6='{type=option, value={id=10, name='Septic Systems', order=9}}', 7='{type=option, value={id=43, name='Septic Tanks', order=43}}', 8='{type=image, value=Image{width=null, height=null, url='https://f.hubspotusercontent00.net/hubfs/2531009/2020%20Mining%20and%20Civil/Products/septic%20tanks%20and%20leach%20drains/septic-tanks/large-septic-tanks/sep7000-1.png'}}', 9='{type=string, value=
  • Manufactured from Durable Polyethylene
  • Engineered Design
  • Chemical and Effluent resistant
  • Lightweight (ease of installation)
  • Various Manhole options
  • Plug & Play with Baffle, Inlet, Outlet &  "T" pieces included
}', 14='{type=option, value={id=1, name='Yes', order=0}}', 15='{type=option, value={id=1, name='Yes', order=0}}', 16='{type=number, value=5}', 17='{type=option, value={id=2, name='No', order=1}}'}, {id=38428257890, createdAt=1604471893029, updatedAt=1631670584580, path='sep-4000', name='4,000 Litre Septic Tank |Coerco| Australia', 1='{type=string, value=4000 Litre Septic Tank}', 2='{type=string, value=COERCO offers certified 4000 Ltr Septic Tank with anti-flotation ring, durable poly, and easy to install fittings. Made to last long term. Read specs here.}', 3='{type=string, value= SEP-4000}', 4='{type=string, value=4000 Litre Septic Tank}', 5='{type=string, value=4,000ltr Septic Tank (2200D x 1770H)}', 6='{type=option, value={id=10, name='Septic Systems', order=9}}', 7='{type=option, value={id=43, name='Septic Tanks', order=43}}', 8='{type=image, value=Image{width=null, height=null, url='https://f.hubspotusercontent00.net/hubfs/2531009/2020%20Mining%20and%20Civil/Products/septic%20tanks%20and%20leach%20drains/septic-tanks/SEP4000.png'}}', 9='{type=string, value=
  • Lightweight, easy to transport and install
  • Manufactured from durable polyethylene
  • Anti floatation ring and ribbing incorporated into design
  • Certified to Australia Standard AS/NZS1456.1 and approved by Department of Health - WA
  • Supplied as complete kit including lid, inlet & outlet "T" pieces
  • Leach Drain systems also available

Poly Septic Tank Certifications

}', 10='{type=string, value=https://f.hubspotusercontent00.net/hubfs/2531009/2020%20Mining%20and%20Civil/Products/septic%20tanks%20and%20leach%20drains/SEP4000.png}', 11='{type=string, value=[{"CODE":"SEP-4000"},{"Diameter (mm)":"2200"},{"Height (mm)":"1770"},{"Capacity (Litres)":"4000"}]}', 14='{type=option, value={id=1, name='Yes', order=0}}', 15='{type=option, value={id=1, name='Yes', order=0}}', 16='{type=number, value=4}', 17='{type=option, value={id=2, name='No', order=1}}'}]

Our Tanks Stand Up To The Toughest Demands, Guaranteed


Manufactured from the finest polyethylene in our own in-house facility, Coerco products are strong, durable and fully weatherproof, so your operations are never interrupted. They’re also lightweight and flexible, making them easy to transport and install wherever the need arises. Our septic tanks are available in a vast range of capacities starting from 1,450 litres through to a massive 23,000 litre underground tank. All septic tanks are manufactured to comply with Department of Health approvals in WA, SA & NT and are Certified to Australia Standard AS/NZS1456.1, so you have complete peace of mind that you’re investing in a safe, secure, high-quality tank.

All Coerco septic tanks feature:

  • Manufactured from durable polyethylene, making them lightweight, easy to transport and install
  • Anti-floatation ring and ribbing incorporated into design
  • Certified to Australia Standard AS/NZS1456.1 and approved by Department of Health - WA, SA & NT
  • Supplied as complete kit including lid, inlet & outlet ‘T’ piecesChemical and Effluent resistant
  • Large septic tanks include various manhole options

Learn More About Our Products


Click on one of the products below to read more about the specific benefits of each of the septic tank products we manufacture:

Get a FREE quote

Invest In The Best, With Coerco

Are you ready to get a quote for your new septic tank? Whatever your application, we have a cost-effective, long-lasting solution to suit your needs. Talk to our experts today to find the best product for you.

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