Why our septic tanks are affordable
Most of the cost of a septic system is not the tank — it is the markup, transport and installation. We cut those layers by selling direct and supply-only, so you only pay for the tank and the freight you choose.
- Direct from the supplier. No plumber or distributor margin built into the price.
- Poly, not concrete. Same Australian certification at a fraction of the transport and handling cost.
- Self-service pickup. Collect from a depot and avoid rural freight fees.
- Right-sizing. 1500L covers most households; only upgrade to 2500L if you need it.
Read our full cost breakdown or compare cheap vs affordable options to see how the numbers stack up.
Frequently asked questions
What makes a septic tank affordable?
A truly affordable septic tank keeps the all-in cost low without cutting corners on certification. Our 1500L poly septic tank starts at $949 supply-only. Poly is 61 kg and can be moved with a standard ute, avoiding the crane and HIAB fees that make concrete installs 30–50% more expensive.
How much does an affordable septic tank cost?
For a certified 1500L poly septic tank, expect from $949 for the tank itself. A full DIY-supported install typically runs $4,500–$6,500, while a turnkey install is $7,000–$10,000. Compare that to concrete, which usually starts at $9,000–$14,000 installed.
Are affordable septic tanks certified?
Yes. Our tanks are certified to AS/NZS 1546.1 — the Australian standard councils check for on-site wastewater treatment. Certification is supplied with the tank, so you can pass inspection without paying a premium.
Where do you supply affordable septic tanks?
We supply across NSW, Queensland and Victoria. Self-service pickup is available from depots, and we can arrange freight to most regional and rural areas.