When it comes to water storage, size does matter—especially in Australia’s unpredictable climate. Whether you’re a homeowner in the suburbs or a farmer managing a large property, investing in a large water tank can deliver serious long-term returns. From fewer water shortages to lower cartage bills and better sustainability outcomes, upsizing your tank isn’t just smart—it’s strategic.
This article explores why bigger is better when it comes to water storage tanks, including the financial, environmental, and practical reasons behind upsizing. If you’re wondering whether it’s worth upgrading from a 5,000L tank to something much bigger—say 10,000L, 22,700L or more—this is the deep dive you’ve been looking for.
The Real Cost of Water: How Tank Size Affects Savings
One of the biggest misconceptions about rainwater tanks is that small tanks save money. In reality, large water tanks provide a much better return on investment over time. Why? Because you reduce the frequency and cost of water delivery, maximise your rain harvesting potential, and protect yourself during dry spells.
Cost-per-litre Comparison:
| Tank Size | Approx. Price | Cost per Litre |
|---|---|---|
| 2,000L Slimline | $1,160 | $0.58/L |
| 5,000L Slimline (Winter Special) | $1,875 | $0.38/L |
| 10,000L Round Poly | $1,850 | $0.19/L |
| 22,700L Round Poly (Winter Special) | $2,795 | $0.12/L |
✅ Conclusion: The 22,700L Round Poly Tank remains the most cost-efficient investment at just 12 cents per litre, especially during seasonal promotions.
Avoiding Cartage Costs: Big Tanks Mean Fewer Deliveries
Australians, particularly in rural and semi-rural areas, often rely on water cartage to top up their supply during dry months. At current prices, a 10,000L water delivery can cost anywhere from $350 to $600, depending on your location.
Big water tanks let you capture and store more rainfall when it comes, meaning:
– Fewer deliveries
– More self-sufficiency
– Huge savings over time
If you require three 10,000L deliveries a year, that’s up to $1,800 annually. A single 22,700L tank could help eliminate that altogether with proper rainfall capture.
Climate-Proofing Your Property
Australia’s climate is famously erratic. A property that enjoys three wet months can face extreme water shortages for the rest of the year. Big water storage tanks give you the buffer capacity to ride out these fluctuations.
Benefits of upsizing include:
– Storing more water during La Niña years to survive El Niño years
– Supporting larger gardens or irrigation zones
– Having peace of mind during council restrictions or supply interruptions
Think of it like a savings account—but for water. When drought hits, your investment in tank capacity will pay for itself many times over.
Boosting Property Value and Livability
Having a large water tank on your property is a major selling point—especially as water scarcity becomes a growing issue nationwide.
Here’s why larger tanks are appealing to buyers:
– Lower utility costs
– Sustainability credentials
– Support for gardens, animals, pools, or off-grid living
– Bushfire preparedness
Larger tanks also integrate well with dual-use setups like garden beds, irrigation, pool top-ups, or animal troughs. The more your tank can do, the more valuable it becomes.
The Shot Weight Advantage: Durability for the Long Haul
Not all tanks are created equal. While many competitors boast capacity, The Water Tank Factory stands out for its superior construction and durability. Our poly tanks feature higher shot weights—which means thicker walls and longer-lasting performance.
️ Shot Weight & Warranty Comparison
| Brand | Shot Weight (22,700L Tank) | Warranty |
|---|---|---|
| The Water Tank Factory | 400+ kg | 10+10 years |
| Bushmans Tanks | ~340 kg | 10 years |
| TankWorld | ~350 kg | 10 years |
✅ Note: The Water Tank Factory offers a 10-year repair/replacement warranty plus an additional 10-year pro-rata warranty—offering extended peace of mind that most competitors don’t match.
Multiple Tank Setup = Even More Flexibility
Large properties often need huge water tanks, more than 22,700 litres. That’s where interconnected tank systems shine. With our range, you can:
– Connect multiple tanks to expand capacity
– Separate tanks by use (e.g. one for irrigation, one for stock)
– Create staged overflow systems
Whether it’s a dairy farm or eco-retreat, The Water Tank Factory’s modular solutions offer massive water tank capacity with flexible layout options.
Are Bigger Tanks Always Better? Things to Consider
While upsizing provides excellent ROI, there are some things to consider before purchasing:
– Available space: Large water tanks take up more footprint. Round tanks require wide access; slimline tanks suit narrow areas.
– Council rules: Some urban zones limit tank height or placement.
– Budget: Large water storage tanks cost more upfront, though they quickly pay off long term.
Need help choosing the best size? Our team can help you assess rainfall patterns, roof area, and usage needs to get it right the first time. Call our friendly team on 1300 826 532
Why Buy from The Water Tank Factory?
✅ Largest range in Australia – over 1,745 style, size, and colour combinations
✅ Superior shot weight for strength and lifespan
✅ Factory-direct pricing
✅ Fast delivery across Australia
✅ 10+10-year warranty on select poly tanks
✅ Expert advice from a trusted Aussie brand
Ready to upgrade to a big water tank? Start exploring our full range of large water tanks here.