Enduramaxx Underground Water Tanks
Selected tank: 800 L · VTR-80
- Model / SKU
- VTR-80
- Nominal capacity
- 800 litres
- Tank type
- Non-potable, underground
- Dimensions
- Ø 1100 × H 1200 mm (manufacturer-listed; version confirmation required)
- Discharge / outlet
- Connection arrangement requires confirmation; no standard above-ground connector assumed
- Included cover
- 600 × 600 mm galvanised cover (supplier-listed configuration)
- Clear access opening
- Not separately confirmed. Lid/cover dimensions are not a guaranteed clear opening.
Current manufacturer-listed size. Earlier VTR catalogue figures differ (Ø1140 × H1085 mm). Confirm the supplied moulding and overall height including the cover before planning restricted access or excavation.
VTR catalogue figures are retained from the earlier tank work. Manufacturer pages and drawing revisions differ. Confirm the current tank, access cover, load rating, fittings and excavation requirements before ordering.
Selected tank: 1,100 L · VTR-110
- Model / SKU
- VTR-110
- Nominal capacity
- 1,100 litres
- Tank type
- Non-potable, underground
- Dimensions
- Ø 1100 × H 1400 mm (manufacturer-listed; version confirmation required)
- Discharge / outlet
- Connection arrangement requires confirmation; no standard above-ground connector assumed
- Included cover
- 600 × 600 mm galvanised cover (supplier-listed configuration)
- Clear access opening
- Not separately confirmed. Lid/cover dimensions are not a guaranteed clear opening.
Current manufacturer-listed size. Earlier VTR catalogue figures differ (Ø1140 × H1485 mm). Confirm the supplied moulding and overall height including the cover before planning restricted access or excavation.
VTR catalogue figures are retained from the earlier tank work. Manufacturer pages and drawing revisions differ. Confirm the current tank, access cover, load rating, fittings and excavation requirements before ordering.
Selected tank: 1,400 L · VTR-140
- Model / SKU
- VTR-140
- Nominal capacity
- 1,400 litres
- Tank type
- Non-potable, underground
- Dimensions
- Ø 1119 × H 1734 mm (manufacturer-listed; version confirmation required)
- Discharge / outlet
- Connection arrangement requires confirmation; no standard above-ground connector assumed
- Included cover
- 600 × 600 mm galvanised cover (supplier-listed configuration)
- Clear access opening
- Not separately confirmed. Lid/cover dimensions are not a guaranteed clear opening.
Current manufacturer-listed size. Earlier VTR catalogue figures differ (Ø1140 × H1885 mm). Confirm the supplied moulding and overall height including the cover before planning restricted access or excavation.
VTR catalogue figures are retained from the earlier tank work. Manufacturer pages and drawing revisions differ. Confirm the current tank, access cover, load rating, fittings and excavation requirements before ordering.
Selected tank: 1,500 L · VTR-150
- Model / SKU
- VTR-150
- Nominal capacity
- 1,500 litres
- Tank type
- Non-potable, underground
- Dimensions
- L 1400 × W 1580 × H 1950 mm (manufacturer-listed; version confirmation required)
- Discharge / outlet
- Connection arrangement requires confirmation; no standard above-ground connector assumed
- Included cover
- 600 × 600 mm galvanised cover (supplier-listed configuration)
- Clear access opening
- Not separately confirmed. Lid/cover dimensions are not a guaranteed clear opening.
Current manufacturer-listed size. Earlier VTR catalogue figures differ (1400 × 1580 × 1560 mm). Confirm the supplied moulding and overall height including the cover before planning restricted access or excavation.
VTR catalogue figures are retained from the earlier tank work. Manufacturer pages and drawing revisions differ. Confirm the current tank, access cover, load rating, fittings and excavation requirements before ordering.
Selected tank: 1,700 L · VTR-170
- Model / SKU
- VTR-170
- Nominal capacity
- 1,700 litres
- Tank type
- Non-potable, underground
- Dimensions
- Ø 1100 × H 2418 mm (manufacturer-listed; version confirmation required)
- Discharge / outlet
- Connection arrangement requires confirmation; no standard above-ground connector assumed
- Included cover
- 600 × 600 mm galvanised cover (supplier-listed configuration)
- Clear access opening
- Not separately confirmed. Lid/cover dimensions are not a guaranteed clear opening.
Current manufacturer-listed size. Earlier VTR catalogue figures differ (Ø1140 × H2435 mm). Confirm the supplied moulding and overall height including the cover before planning restricted access or excavation.
VTR catalogue figures are retained from the earlier tank work. Manufacturer pages and drawing revisions differ. Confirm the current tank, access cover, load rating, fittings and excavation requirements before ordering.
Selected tank: 2,500 L · VTR-250
- Model / SKU
- VTR-250
- Nominal capacity
- 2,500 litres
- Tank type
- Non-potable, underground
- Dimensions
- L 1900 × W 1580 × H 1960 mm (manufacturer-listed nominal size)
- Discharge / outlet
- Connection arrangement requires confirmation; no standard above-ground connector assumed
- Included cover
- 600 × 600 mm galvanised cover (supplier-listed configuration)
- Clear access opening
- Not separately confirmed. Lid/cover dimensions are not a guaranteed clear opening.
VTR catalogue figures are retained from the earlier tank work. Manufacturer pages and drawing revisions differ. Confirm the current tank, access cover, load rating, fittings and excavation requirements before ordering.
Selected tank: 3,500 L · VTR-350
- Model / SKU
- VTR-350
- Nominal capacity
- 3,500 litres
- Tank type
- Non-potable, underground
- Dimensions
- L 2480 × W 1580 × H 1940 mm (manufacturer-listed nominal size)
- Discharge / outlet
- Connection arrangement requires confirmation; no standard above-ground connector assumed
- Included cover
- 600 × 600 mm galvanised cover (supplier-listed configuration)
- Clear access opening
- Not separately confirmed. Lid/cover dimensions are not a guaranteed clear opening.
VTR catalogue figures are retained from the earlier tank work. Manufacturer pages and drawing revisions differ. Confirm the current tank, access cover, load rating, fittings and excavation requirements before ordering.
Selected tank: 5,000 L · VTR-500
- Model / SKU
- VTR-500
- Nominal capacity
- 5,000 litres
- Tank type
- Non-potable, underground
- Dimensions
- L 2480 × W 2030 × H 2390 mm (manufacturer-listed; version confirmation required)
- Discharge / outlet
- Connection arrangement requires confirmation; no standard above-ground connector assumed
- Included cover
- 600 × 600 mm galvanised cover (supplier-listed configuration)
- Clear access opening
- Not separately confirmed. Lid/cover dimensions are not a guaranteed clear opening.
The current feature specification lists L2480 × W2030 × H2390, matching the earlier VTR catalogue. The same page also lists L2480 × W2000 × H2140 in additional information. Confirm the current supplied version and overall height including the cover.
VTR catalogue figures are retained from the earlier tank work. Manufacturer pages and drawing revisions differ. Confirm the current tank, access cover, load rating, fittings and excavation requirements before ordering.
Selected tank: 10,000 L · VTR-1000
- Model / SKU
- VTR-1000
- Nominal capacity
- 10,000 litres
- Tank type
- Non-potable, underground
- Dimensions
- L 3980 × W 2180 × H 2540 mm (manufacturer-listed nominal size)
- Discharge / outlet
- Connection arrangement requires confirmation; no standard above-ground connector assumed
- Included cover
- 600 × 600 mm galvanised cover (supplier-listed configuration)
- Clear access opening
- Not separately confirmed. Lid/cover dimensions are not a guaranteed clear opening.
Manufacturer lists the current 10,000 L square-lid option as code 1000. Dimensions match the existing VTR-1000 catalogue; legacy code retained.
VTR catalogue figures are retained from the earlier tank work. Manufacturer pages and drawing revisions differ. Confirm the current tank, access cover, load rating, fittings and excavation requirements before ordering.
Need help choosing fittings for this tank? Contact us for advice on compatible valves and adaptors.
Enduramaxx underground tanks provide concealed, non-potable water storage for compatible rainwater harvesting, irrigation and process-water systems. Capacities range from 800 to 10,000 litres in vertical flat-base and horizontal formats.
5,000 litres and above: price on application
For tank options of 5,000 litres and above, please request a quote before ordering. We will confirm the tank price, delivery to your postcode, site access and offloading requirements. These sizes are not available to buy online. Smaller sizes remain available to order at the displayed price.
Tank dimensions by model
Nominal dimensions in millimetres. L = length, W = width, H = height, Ø = diameter. Updated rows use Enduramaxx drawings and clarification supplied on 2 November 2026; other rows retain existing manufacturer specifications. Read each row’s measurement and configuration notes. Allow installation and maintenance clearance, including the manufacturer’s ±3% tolerance where stated. Nominal lid/cover size is not the clear access opening.
| Tank / model | Dimensions (mm) | Standard outlet | Nominal lid / cover (mm) |
|---|---|---|---|
|
800 L · VTR-80 VTR-80 |
Ø 1140; tank/turret H 1060 Drawing VTR80-A, revision A: tank/turret height as dimensioned. The galvanised cover is shown separately; confirm the complete installed cover height and clear opening before excavation. |
Please contact us | 600 × 600 Galvanised |
|
1,100 L · VTR-110 VTR-110 |
Ø 1140; tank/turret H 1460 Drawing VTR110-A, revision A: tank/turret height as dimensioned. The galvanised cover is shown separately; confirm the complete installed cover height and clear opening before excavation. |
Please contact us | 600 × 600 Galvanised |
|
1,400 L · VTR-140 VTR-140 |
Ø 1140; tank/turret H 1860 Drawing VTR140-A, revision A: tank/turret height as dimensioned. The galvanised cover is shown separately; confirm the complete installed cover height and clear opening before excavation. |
Please contact us | 600 × 600 Galvanised |
|
1,500 L · VTR-150 VTR-150 |
L 1400 × W 1580; tank/turret H 1955 Supplied drawing includes a 250 mm non-potable turret extension. The galvanised cover is shown separately; confirm the complete supplied cover height before excavation. |
Please contact us | Please contact us |
|
1,700 L · VTR-170 VTR-170 |
Ø 1140; tank/turret H 2410 Drawing VTR170-A, revision A: tank/turret height as dimensioned. The galvanised cover is shown separately; confirm the complete installed cover height and clear opening before excavation. |
Please contact us | 600 × 600 Galvanised |
|
2,500 L · VTR-250 VTR-250 |
L 1900 × W 1580 × H 1960 |
Please contact us | 600 × 600 Galvanised |
|
3,500 L · VTR-350 VTR-350 |
L 2480 × W 1580 × H 1940 |
Please contact us | 600 × 600 Galvanised |
|
5,000 L · VTR-500 VTR-500 |
L 2480 × W 2030; tank/turret H 2405 Supplied drawing includes a 250 mm non-potable turret extension; it also dimensions the tank body at 2140 mm. The cover is shown separately; confirm the complete supplied cover height before excavation. |
Please contact us | 600 × 600 Galvanised |
|
10,000 L · VTR-1000 VTR-1000 |
L 3980 × W 2180 × H 2540 Size information: Manufacturer lists the current 10,000 L square-lid option as code 1000. Dimensions match the existing VTR-1000 catalogue; legacy code retained. |
Please contact us | Please contact us |
Manufacturer dimensioned drawings
Download Enduramaxx dimensioned drawings (PDF) for VTR-80, VTR-110, VTR-140, VTR-150, VTR-170 and VTR-500. These are manufacturer drawings supplied on 2 November 2026. Match the model and inlet/turret configuration before using a drawing for access or base planning.
Selection information
Black tanks with the included galvanised access cover: the supplier-listed range is 800, 1,100, 1,400, 1,500, 1,700, 2,500, 3,500, 5,000 and 10,000 litres. These are non-potable configurations supplied with the 600 × 600 mm galvanised access cover listed for each model.
Choose a capacity above to see its model code, price and available model photograph. Exact photographs are shown for VTR-80, VTR-110, VTR-140, VTR-170, VTR-250, VTR-350 and VTR-500. The exact supplied configuration for VTR-150 and VTR-1000 still needs photograph confirmation; gallery images include other sizes.
- The dimensions table lists nominal capacity, model code and the measurement basis for each option
- All options in this listing are non-potable
- Tank format and inlet depth affect the excavation and pipe levels
Underground tank installation is a civil-engineering task. Ground conditions, groundwater, vehicle loading, excavation support, concrete base and surround, access cover, ventilation, anchoring and buoyancy risk must all be assessed before ordering. These polyethylene tanks must not be treated as trafficable unless the complete structural cover and installation have been specifically designed for the imposed loads.
Use the current Enduramaxx installation guide for the selected VTR model and obtain site-specific professional advice where required. Confirm offloading and lifting arrangements before delivery.
The dimensions table above distinguishes the tank/turret measurements shown on the supplied drawings from the final installed cover height. Lid or cover size is nominal and does not establish the clear access opening.
Manufacturer installation guides
The gallery shows separate manufacturer installation diagrams labelled for the vertical and horizontal VTR models. The vertical diagram illustrates the no-groundwater procedure; groundwater requires the different full-concrete procedure in the complete guide. Empty underground tanks can float in shallow groundwater. Installation must be undertaken by suitably qualified, experienced personnel, with groundwater, buoyancy and imposed loads assessed for the site. The diagrams do not make the tank trafficable. Follow the matching full guide, including progressive water ballast and concrete-curing requirements.
- Vertical underground tanks installation guide (PDF) - for VTR-80, VTR-110, VTR-140 and VTR-170.
- Horizontal underground tanks installation guide (PDF) - for VTR-150, VTR-250, VTR-350, VTR-500 and VTR-1000.
Choose the guide for the selected model and have the ground conditions and loading assessed for the site.
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