BWT10-MG
$2,095.00 NZD
$2,295.00 NZD
You save: 8% (
$200.00 NZD
)
All prices include GST
The 10,000 Litre Plastic Water Tank is New Zealand’s ultimate compact solution for tiny homes, off-grid cabins, rural secondary storage, and residential rainwater harvesting. Weighing in at an impressive 225kg, it offers one of the heaviest shot weights on the market for extreme durability.
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Built tough in Auckland with New Zealand’s highest standard shot weight (225kg) for a 10,000L tank, ensuring thick, robust walls and a proven self-supporting dome roof design. Engineered for safe, clean drinking water storage across homes, farms, and lifestyle blocks.
The 10,000L size is our most versatile compact tank, making it the top choice across New Zealand for targeted off-grid and domestic applications:
Provides plenty of storage without taking up a massive footprint. Pair it with an ultra-efficient pump for off-grid power systems.
Pairing a 10k tank with a solar setup? Upgrade to the DAB Esybox Pop. Its 300W variable-speed inverter motor avoids high startup power spikes, making it ideal for battery and solar setups.
Perfect for storing low-yield borehole water, stock drinking water, or collecting rainwater off outbuildings, garages, and implement sheds.
Ensure your harvested rainwater is 100% safe. Add a 2-stage filtration unit with UV sterilization to kill bacteria and pathogens.
Unlike some competitors offering pro-rata coverage that loses value every year, Big Water Tanks provides a true Full 20-Year Repair or Replacement Warranty engineered specifically for New Zealand conditions.
Ensure your site preparation meets warranty conditions by downloading our official guide below.
| Volume | 10,000 Litres (2,200 Gallons) |
| Diameter | 2.25 m (2,250 mm) |
| Height | 2.90 m (2,900 mm) |
| Weight | 225 kg (Heaviest 10k on NZ Market) |
| Outlet Size | 50mm BSP Brass Outlet |
| UV Protection | UV20 Rated Long-Life Resin |
| Material Compliance | AS/NZS 2070 (Food Grade), AS4020 (Potable Water), AS/NZS 4766 |
We deliver tanks across the North Island using specialized truck & trailer or 4x4 off-road rigs from Glendene (Auckland) or Taupo:
| 0 – 100 km | $150.00 incl. GST |
| 100 – 200 km | $200.00 incl. GST |
| 200 – 275 km | $300.00 incl. GST |
Note: Delivery is to the gate. Drivers will endeavor to place the tank in position if site access permits.
Yes! A 10,000L tank is one of the most popular capacities for 1–2 person off-grid cabins, tiny homes, and holiday dwellings. Paired with a decent roof catchment area and an energy-efficient pump like the DAB Esybox Pop, it provides plenty of storage for daily household consumption.
Big Water Tanks 10,000L models can be buried up to 500mm in the ground while retaining their full 20-Year Warranty. Please ensure proper site compaction and natural drainage around the site to prevent flotation during wet winter conditions.
Our tanks feature smooth, uncorrugated side walls for superior structural integrity. Corrugations can act like an accordion, flexing vertically under weight and creating stress points. Rotational moulding also makes plastic thinner on convex curves, reducing effective wall thickness. Smooth walls maintain consistent, heavy-duty thickness throughout.
We provide a Full 20-Year Repair or Replacement Warranty. Unlike some competitors who offer "pro-rata" warranties (where the value depreciates every year), our warranty maintains 100% cover for the entire 20-year period.