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title: "Compare Septic Tanks | Bush Billabongs"
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[![Bush Billabongs logo — septic systems and rural solutions](/assets/logo-DxEVICWB.png)Bush Billabongs ](/)

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1.  [Home](/)
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Our Range

# Compare Our Septic Tank Range

Three-chamber polyethylene septic tanks sized for everything from tiny homes to larger rural dwellings. Supply-only with [pickup across NSW, QLD and VIC](/shipping-and-collection).

![Bush Billabongs 1500L septic tank on a rural Australian property](/assets/product-real-1-BwwO7lHQ.jpg)![Bush Billabongs logo](/assets/logo-DxEVICWB.png)

Most Popular

1,500 Litres

## 1500L Septic Tank

Compact three-chamber poly tank for tiny homes, granny flats and small dwellings.

Best for

1–4 bedroom small dwellings

-   2,030 × 1,110 × 1,120 mm 
-   61 kg empty — easy to handle 
-   5.3 mm ribbed wall thickness 

From $949 AUD (exc GST)

[View Details](/product)

![Bush Billabongs 2500L three-chamber poly septic tank](/assets/product-2500l-clean-1-C8EdMd7s.jpg)![Bush Billabongs logo](/assets/logo-DxEVICWB.png)

Larger Capacity

2,500 Litres

## 2500L Septic Tank

Higher-capacity three-chamber poly tank for larger homes and multi-bedroom builds.

Best for

Larger family homes & acreage

-   2,750 × 1,210 × 1,180 mm 
-   Higher daily flow capacity 
-   Three-chamber poly construction 

From $1,790 AUD (exc GST)

[View Details](/product/2500l-septic-tank)

## 1500L vs 2500L — At a Glance

Same proven three-chamber poly design, two sizes for two different builds.

Spec

1500L Tank

2500L Tank

Capacity

1,500 litres

2,500 litres

Dimensions (L × W × H)

2,030 × 1,110 × 1,120 mm

2,750 × 1,210 × 1,180 mm

Weight (empty)

61 kg

Approx. 110 kg

Chambers

3

3

Material

Ribbed polyethylene

Ribbed polyethylene

Best for

Tiny homes, granny flats, 1–3 BR dwellings

4+ BR homes, acreage, larger families

Price from (exc GST)

$949 AUD

$1,790 AUD

2500L weight is approximate — contact us for the latest supplier spec sheet.

## Not Sure Which Tank You Need?

Tank size depends on the number of bedrooms and daily wastewater flow. Use our sizing guides or get in touch and we'll help you choose.

[Read the Sizing Guide](/guides/septic-tanks-for-tiny-homes)[Ask Us](/contact)

[![Bush Billabongs logo — septic systems and rural solutions](/assets/logo-DxEVICWB.png)](/)

Supplying affordable poly septic tanks — 1500L for tiny homes and granny flats, 2500L for larger family homes and acreage builds. Pickup across NSW, QLD, and VIC.

Products

[All Septic Tanks](/products)[1500L Septic Tank — from $949](/product)[2500L Septic Tank — from $1,790](/product/2500l-septic-tank)[About Us](/about)[FAQ](/faq)[Blog](/blog)[Guides](/guides)[Partners](/partners)[Contact](/contact)

Service Areas

[New South Wales ](/septic-tanks-nsw)[Queensland ](/septic-tanks-qld)[Victoria ](/septic-tanks-vic)

Contact

[0468 462 047 ](tel:+61468462047)[WhatsApp us ](https://wa.me/61468462047)[info@bushbillabongs.com.au ](mailto:info@bushbillabongs.com.au)

Policies

[Terms and Conditions](/terms-and-conditions)[Privacy Policy](/privacy-policy)[Returns and Refunds](/return-and-refund-policy)[Shipping and Collection](/shipping-and-collection)[Disclaimer](/disclaimer)

© 2026 Bush Billabongs. All rights reserved.

ABN: 97 146 094 166 · Supply only. No installation services.

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