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Every Kilo of SteelIs a Litre You Can't Carry.
Our 20,000L FlexConnex modular poly tank weighs just 1,300 kg. A comparable steel tank can weigh two to three times that — and every extra kilo comes straight off your legal payload. Work out what steel's dead weight is really costing you.
Empty weight → usable payload
On a weight-limited truck, that ~1,900 kg penalty means steel carries ~1,900 litres less water — every single load.
Poly vs Steel — the annual difference
Set your operation below. The estimator uses each tank's empty weight to work out lost payload, then converts that into extra trips, extra water, fuel and maintenance across a full year.
Assumptions — edit to match your gear
Poly weight of 1,300 kg is the published spec for the Rapid Spray 20,000L FlexConnex tank. Steel weight, fuel-per-load and upkeep are editable estimates — steel figures cover rust treatment, recoating and repairs that poly doesn't need.
same number of trips
same water delivered
fewer trips to run
no rust, no recoating
Indicative estimates only, based on legal road payload (1 L water = 1 kg). Total = fuel + maintenance; extra water and loads saved are shown as productivity, not double-counted in dollars. Talk to us for a detailed fleet analysis.
It's not the sticker price. It's the running cost.
Steel and poly can look close on the invoice. The difference shows up every day you run the tank — in payload, fuel, downtime and the freight bill to get it to site.
Lighter Tank, More Water
At 1,300 kg empty, the poly modular frees up payload steel eats with its own weight. On a weight-limited chassis, that's more legal litres on every trip.
No Rust, No Recoating
UV-stabilised poly is rust-proof and impact-resistant. Steel needs rust treatment, recoating and weld repairs — recurring cost and downtime poly simply skips.
Modular Ships Smart
The FlexConnex system moves in modules, not one welded steel monster. Easier to freight, easier to place, and you can add capacity later with a "plus-one" module.
Backed 15–25 Years
A 15-year full tank warranty plus pro-rata cover — Australian made and engineered for harsh conditions, so the payload advantage compounds year after year.
Spec Your Fleet. See the Real Saving.
Send us your chassis and cartage numbers and we'll put a detailed poly-vs-steel breakdown together — no obligation, straight from the team in Singleton.