Instant Bank 
12 months interest free Promax has one of the most versatile and highest-quality ranges of underground tanks in New Zealand.
Our underground stormwater and underground wastewater tanks are designed for the effective retention or detention of stormwater or secure and reliable storage of potable water. Each Promax underground tank is engineered by geotechnical experts and Finite Element Analysis tested (FEA).
Our plastic detention tanks are thoroughly tested and made to withstand ground and water pressure at depth. All this means underground tanks you can trust in a wide variety of settings, including under driveways, footpaths, car parks, forecourts and much more.
The new, more rectangular shape of the ENDURO Underground Tank brings a major advantage to the market by reducing excavation and backfill requirements, saving time and money.
Engineered by geotechnical experts and Finite Element Analysis tested (FEA), the Promax ENDURO Underground Tank is fully tested and designed to withstand ground and water pressure at depth and is suitable for the retention or detention of stormwater or the storage of potable water.
Distinctive Benefits:
- Unique shape reduces excavation and backfill <20%
- 10 Year Warranty
- Traffic rated for vehicles <10000 kg
- Multiple Inlet/Outlet panels
Additional freight charges will apply to South Island orders.
1000l -
| Code | Description | Capacity(L) | Length(mm) | Width(mm) | Height(mm) | Weight(kg) | Manhole Dia(mm) |
|---|---|---|---|---|---|---|---|
| UE1010000 | ENDURO Underground Tank 10,000 Ltr 1.0m | 10000 | 10200 | 1250 | 1000 | 500 | 600 |
3000l -
| Code | Description | Capacity(L) | Length(mm) | Width(mm) | Height(mm) | Weight(kg) | Manhole Dia(mm) |
|---|---|---|---|---|---|---|---|
| UE1003000 | ENDURO Underground Tank 3,000 Ltr 1.0m | 3000 | 3070 | 1250 | 1000 | 150 | 600 |
4000l -
| Code | Description | Capacity(L) | Length(mm) | Width(mm) | Height(mm) | Weight(kg) | Manhole Dia(mm) |
|---|---|---|---|---|---|---|---|
| UE1004000 | ENDURO Underground Tank 4,000 Ltr 1.0m | 4000 | 4115 | 1250 | 1000 | 175 | 600 |
5000l -
| Code | Description | Capacity(L) | Length(mm) | Width(mm) | Height(mm) | Weight(kg) | Manhole Dia(mm) |
|---|---|---|---|---|---|---|---|
| UE1005000 | ENDURO Underground Tank 5,000 Ltr 1.0m | 5000 | 5115 | 1250 | 1000 | 250 | 600 |
6000l -
| Code | Description | Capacity(L) | Length(mm) | Width(mm) | Height(mm) | Weight(kg) | Manhole Dia(mm) |
|---|---|---|---|---|---|---|---|
| UE1006000 | ENDURO Underground Tank 6,000 Ltr 1.0m | 6000 | 6115 | 1250 | 1000 | 300 | 600 |
7000l -
| Code | Description | Capacity(L) | Length(mm) | Width(mm) | Height(mm) | Weight(kg) | Manhole Dia(mm) |
|---|---|---|---|---|---|---|---|
| UE1007000 | ENDURO Underground Tank 7,000 Ltr 1.0m | 7000 | 7160 | 1250 | 1000 | 325 | 600 |
8000l -
| Code | Description | Capacity(L) | Length(mm) | Width(mm) | Height(mm) | Weight(kg) | Manhole Dia(mm) |
|---|---|---|---|---|---|---|---|
| UE1008000 | ENDURO Underground Tank 8,000 Ltr 1.0m | 8000 | 8160 | 1250 | 1000 | 350 | 600 |
9000l -
| Code | Description | Capacity(L) | Length(mm) | Width(mm) | Height(mm) | Weight(kg) | Manhole Dia(mm) |
|---|---|---|---|---|---|---|---|
| UE1009000 | ENDURO Underground Tank 9,000 Ltr 1.0m | 9000 | 9160 | 1250 | 1000 | 450 |
600 |
10,000l -
| Code | Description | Capacity(L) | Length(mm) | Width(mm) | Height(mm) | Weight(kg) | Manhole Dia(mm) |
|---|---|---|---|---|---|---|---|
| UE1010000 | ENDURO Underground Tank 10,000 Ltr 1.0m | 10000 | 10200 | 1250 | 1000 | 500 | 600 |
About Promax
Promax water tanks are built tough for New Zealand conditions, combining strength, durability, and long-lasting performance. The premium corrugated ENDURO range delivers maximum reliability over many years, while the XPRESS range provides the same trusted Promax quality at a more affordable price point.
Available in a wide range of sizes, shapes, and colours, Promax tanks are designed to blend into your property and meet any water storage need – from residential rainwater harvesting to commercial or agricultural use. With options for both above-ground and underground installation, there’s a Promax tank for every project.
Shop the full Promax range at Turfrey – your trusted supplier of water storage solutions in New Zealand.
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