--- title: "Small 1500L Poly Septic Tank — From $949 | Bush Billabongs" description: "Small 1500L three-chamber poly septic tank for tiny homes, granny flats and off-grid builds. Supply-only from $949 AUD across NSW, QLD and VIC." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "Product", "name": "1500L Three-Chamber Polyethylene Septic Tank", "description": "Bush Billabongs 1500L three-chamber polyethylene septic tank. Suitable for tiny homes, granny flats, cabins and off-grid builds up to 4 bedrooms. Dimensions: 2030 x 1110 x 1120mm. Weight: 61kg. 5mm wall thickness. 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[Home](/) 2. Product 2026 Design # 1500L Septic Tank — From $949 AUD A reliable, compact septic tank designed for tiny homes, cabins, and small dwellings across Australia. Self-service [pickup from our network](/shipping-and-collection). ![1500L ribbed septic tank for tiny homes and small dwellings](/assets/product-gallery-1-kyNn1Jm1.avif)![Bush Billabongs logo](/assets/logo-DxEVICWB.png) ## Product Overview The Bush Billabongs 1500L Septic Tank features a ribbed structural wall design engineered for strength when buried. Its compact footprint makes it ideal for small lots and tight builds, suitable for tiny homes, cabins, sheds, granny flats and secondary dwellings across Australia. Specifications Specs FeaturesUse Cases Uses ### Technical Specifications Capacity 1,500 Litres Length 2,030 mm Width 1,110 mm Height 1,120 mm Weight 61 kg Material Ribbed Polyethylene Chambers 3 Suitable For 1–4 Bedroom Dwellings [Enquire About Pricing](/contact)[Read Our FAQ](/faq) ## Documentation Download our guides to understand how septic tanks work and how to install yours. [ How Septic Tanks Work PDF ](/how-septic-tanks-work.pdf)[ Function of Each Chamber PDF ](/function-of-each-chamber.pdf)[ Installation Guide PDF ](/septic-tank-installation-guide.pdf) ## Product Gallery See our 1500L septic tank from every angle. ![1500L Bush Billabongs septic tank delivered on-site at a rural Australian property next to a tiny home](/assets/product-real-1-BwwO7lHQ.jpg)![Bush Billabongs logo](/assets/logo-DxEVICWB.png) ![Bush Billabongs 1500L septic tank loaded on a ute trailer with three inspection lids ready for delivery](/assets/product-real-3-CnVGi5MC.jpg)![Bush Billabongs logo](/assets/logo-DxEVICWB.png) ![1500L Bush Billabongs septic tank strapped onto the tray of a black ute, ready for transport to a regional Australian property](/assets/product-real-4-CbIwdSCO.jpg)![Bush Billabongs logo](/assets/logo-DxEVICWB.png) ![Front-on view of the Bush Billabongs 1500L three-chamber septic tank on grass with eucalyptus trees behind](/assets/product-real-5-DRWUj22O.jpg)![Bush Billabongs logo](/assets/logo-DxEVICWB.png) ![Bush Billabongs 1500L septic tank installation view 1](/assets/product-gallery-1-kyNn1Jm1.avif)![Bush Billabongs logo](/assets/logo-DxEVICWB.png) ![Bush Billabongs 1500L septic tank installation view 2](/assets/product-gallery-2-DvMxWI9S.avif)![Bush Billabongs logo](/assets/logo-DxEVICWB.png) ![Bush Billabongs 1500L septic tank installation view 3](/assets/product-gallery-3-MyCzvxJb.avif)![Bush Billabongs logo](/assets/logo-DxEVICWB.png) ![Bush Billabongs 1500L septic tank installation view 4](/assets/product-gallery-4-dr0KjMxf.avif)![Bush Billabongs logo](/assets/logo-DxEVICWB.png) ## Quality Test Results Every Bush Billabongs septic tank undergoes rigorous quality testing. Here are the verified results for our 1500L tank build. Wall Thickness Perfect Result: 5.3mm · Required: ≥5mm Shock & Impact Resistance Passed Result: Passed Watertightness (Full Water Test) Passed Result: Passed Density Great quality material Result: 948 kg/m³ · Required: ≥930 kg/m³ Tensile Strength Very strong Result: 23 MPa · Required: ≥20 MPa Elongation at Break Excellent flexibility Result: 367% · Required: ≥120% Bending Modulus Great stiffness Result: 810 MPa · Required: ≥700 MPa Surface Finish Passed Result: Passed ## Septic Tank Price Our 1500L poly septic tank price starts at **$949 AUD excluding GST**. This is significantly less than the $1,200 to $2,500 typically charged by plumbing suppliers and hardware stores for a comparable small septic tank. We keep prices low through direct importing with no middlemen or showroom overheads. See the full [septic tank cost breakdown for Australia](/septic-tank-cost-australia) for installer and council fees. ## How to Order Order online through our website, select your preferred [pickup location](/shipping-and-collection), and collect your tank when notified. It's that simple. Have questions? Check our [FAQ page](/faq) or [get in touch](/contact). ## Learn More - → [Do You Need a Septic Tank for a Tiny Home?](/blog/do-you-need-a-septic-tank-for-a-tiny-home) - → [How Much Does a 1500L Septic Tank Cost in Australia?](/blog/how-much-does-a-1500l-septic-tank-cost) ## Important — Supply Only Bush Billabongs supplies septic tanks only. We do not provide installation, excavation, plumbing or council approval services. Please ensure you engage a licensed plumber for installation and check your local council requirements before purchasing. Larger build? ## Need more capacity than 1500L? Our [2500L three-chamber poly septic tank](/product/2500l-septic-tank) is sized for 4+ bedroom homes, larger families and acreage builds. Same proven design, more daily flow. From **$1,790 AUD (exc GST)**. [View 2500L Tank](/product/2500l-septic-tank)[Compare Tanks](/products) Available for pickup in [NSW](/septic-tanks-nsw), [QLD](/septic-tanks-qld), and [VIC](/septic-tanks-vic). ## Interested in This Tank? Get in touch to check availability and pricing for your location. [Enquire Now](/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. Call now