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Promax Plastic Water Tanks

Promax plastic water tanks are the strongest in New Zealand. The Promax Enduro range is the only plastic water tank in New Zealand that can be buried up to 1 metre in the ground and still retain a full 20-year warranty! These ultra-strong tanks are engineered to withstand the test of time in New Zealand's harshest conditions and can complement every landscape with their contemporary look. Explore the Promax range below.

What Sizes Are Promax Water Tanks Available In?

Our range of Promax plastic water tanks includes several sizes ranging from 2,000L to 30,000L. This huge capacity range ensures you can find the perfect option to meet your needs. Additionally, you can find low-profile and slimline options to limit how much space your water tank consumes.

How Can I Maintain My Promax Water Tank to Ensure Optimal Performance?

To ensure optimal performance of your Promax water tank, it’s important to conduct proper maintenance.
1. Inspect your tank: Inspect the tank at least once a year for signs of wear, damage, or contamination, such as cracks, leaks, or algae growth.
2. Clean your tank: Clean your tank every 2-3 years (or when needed); drain it, remove sediment and debris, and scrub the interior with a disinfectant.
3. Check and maintain fittings: Regularly inspect all fittings, pipes, and valves to prevent leaks and water contamination. Ensure you replace anyworn or damaged parts promptly.
4. Ensure proper ventilation: Keep the vent clear from blockages. Optimal ventilation prevents vacuum formation and the growth of anaerobic bacteria.
5. Clean your roof and gutters: If your tank collects rainwater, it’s vital to clean your roof and gutter system regularly. Consider installing gutter
guards to reduce debris.
6. Install a Filter: Installing a water filter at the tank inlet removes particles and improves water quality.
7. Clear overflow system: A clear and functioning overflow system prevents water from logging around the tank.
8. Winterise your tank (if necessary): In New Zealand’s coldest regions, you may need to insulate pipes and use heaters or circulation pumps to prevent the water from freezing.

For advice and guidance on your specific tank’s maintenance requirements, contact our team.

What Makes Promax Tanks the Strongest in NZ?

Promax has built a strong reputation in New Zealand for providing reliable and long-lasting water tanks. Promax's Enduro range, is the only tank on the NZ market with a corrugated wall. The Enduro tanks incorporate structural features like ribbing and corrugation to enhance their ability to withstand external pressures and seismic activity. The rotational moulding process creates tanks without seams or weak points, reducing the risk of leaks or cracks over time. Thorough testing and quality
checks ensure the tanks meet high performance standards.

What is the Warranty Period for Promax Water Tanks, and What Does it Cover?

If the product is used under normal conditions and has not been modified or misused, Promax water tanks come with an incredible pro rata 20-year warranty that
covers manufacturing defects in materials and workmanship from the date of retail purchase. 

Contact the Rural Water Team for a quote that compares all your options and includes important details such as delivery times, prices, warranties, dimensions, shipping costs & installation differences. Making it easier for you. 

  • 25,000L Promax Water Tank - Rural Water
    Original price $4,210.00
    Current price $3,720.00

    25,000L Promax Enduro Water Tank

    Promax

    Excluding GST

      25,000L Promax Enduro Plastic Water Tank New Zealand's strongest tank.  North & South Island Model: 3660mm (d) x 2800mm (h), 387.6kg The onl...

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    Original price $4,210.00
    Current price $3,720.00
  • 30,000L Promax Enduro Plastic Water Tank - Rural Water
    Original price $4,973.00
    Current price $4,450.00

    30,000L Promax Enduro Plastic Water Tank

    Promax

    Excluding GST

      30,000L Promax Enduro Plastic Water Tank New Zealand's strongest tank.  North & South Island Model: 3660mm (d) x 3100mm (h), 433.5kg The onl...

    View full details
    Original price $4,973.00
    Current price $4,450.00
  • 25,000L Promax Xpress Plastic Water Tank - Rural Water
    Original price $3,600.00
    Current price $3,092.00

    25,000L Promax Xpress Plastic Water Tank

    promax

    Excluding GST

      25,000L Promax Xpress Plastic Water Tank North & South Island Model: 3660mm (d) x 2800mm (h), 387.8kg This is a strictly above-ground tank, ...

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    Original price $3,600.00
    Current price $3,092.00
  • 30,000L Promax Xpress Plastic Water Tank - Rural Water
    Original price $4,473.00
    Current price $3,845.00

    30,000L Promax Xpress Plastic Water Tank

    promax

    Excluding GST

      30,000L Promax Xpress Plastic Water Tank North & South Island Model: 3660mm (d) x 3100mm (h), 430kg This is a strictly above ground tank, unl...

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    Original price $4,473.00
    Current price $3,845.00
  • 5,000L Promax Water Tank - Rural Water
    $1,950.00

    5,000L Promax Plastic Water Tank

    Promax

    Excluding GST

    5,000L Promax Plastic Water Tank  Promax - New Zealand's strongest tank.  North & South Island Model: 1600mm (d) x 2650mm (h), 100kg Our cor...

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    $1,950.00
  • Promax Rainwater Collection Kit - Rural Water
    Original price $320.87
    Current price $288.00

    Promax Rainwater Collection Kit

    Promax

    Excluding GST

    Promax Rainwater Collection Kit Bundle and Save! Cleaner Water to Your Tank  Our Accessory Bundles are an easier, and cheaper way of purchasing ...

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    Original price $320.87
    Current price $288.00
  • 10,000L Promax Enduro Water Tank *North Island Only - Rural Water
    Original price $2,910.00
    Current price $2,770.00

    10,000L Promax Enduro Water Tank *North Island Only

    Promax

    Excluding GST

    10,000L Promax Enduro Plastic Water Tank *North Island Only New Zealand's strongest tank.  North Island Model: 2200mm (d) x 2900mm (h), 180kg The...

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    Original price $2,910.00
    Current price $2,770.00
  • 2,000L Promax Slimline Water Tank - Rural Water
    $3,160.00

    2,000L Promax Slimline Water Tank

    Promax

    Excluding GST

    2,000L Promax Slimline Water Tank  North & South Island Model: 570mm (w) x 2150mm (h), 2250mm (L), 150kg Slimline plastic water tanks are desi...

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    $3,160.00
  • Promax Floating Outtake - Rural Water
    from $278.00

    Promax Floating Outtake

    promax

    Excluding GST

    This kit is very easy to install and contains all the 50mm fittings required to install a water balance pipeline between two tanks to allow them t...

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    from $278.00
  • 2,000L Promax Slimline Water Tank & Pump Combo - Rural Water
    $4,300.00

    2,000L Promax Slimline Water Tank & Pump Combo

    Promax

    Excluding GST

    2,000L Promax Slimline Water Tank & Pump Combo North & South Island Model: 570mm (w) x 2150mm (h), 2250mm (L), 150kg Slimline plastic wate...

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    $4,300.00
  • 3,000L Promax Slimline Water Tank - Rural Water
    $3,850.00

    3,000L Promax Slimline Water Tank

    Promax

    Excluding GST

    3,000L Promax Slimline Water Tank  North & South Island Model: 570mm (w) x 2150mm (h), 3000mm (L), 150kg Slimline plastic water tanks are desi...

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    $3,850.00
  • 5,000L Promax Plastic Water Tank Low Profile *North Island Only - Rural Water
    $2,300.00

    5,000L Promax Plastic Water Tank Low Profile *North Island Only

    Rural Water

    Excluding GST

    5,000L Promax Plastic Water Tank - Low Profile *North Island Only Promax - New Zealand's Strongest Plastic Water Tank.   North Island Model: 2200...

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    $2,300.00
  • Promax Buried Dual Tank Fire Service Outlet Kit - 100mm - Rural Water
    $3,050.43

    Promax Buried Dual Tank Fire Service Outlet Kit - 100mm

    promax

    Excluding GST

    The Dual Buried Fire Outlet Kit is required when you wish to draw water from both tanks whilst buried. Shipping: This can be delivered free to your...

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    $3,050.43
  • Promax Buried Single Tank Fire Service Outlet Kit - 100mm - Rural Water
    $2,459.00

    Promax Buried Single Tank Fire Service Outlet Kit - 100mm

    promax

    Excluding GST

    The Single Tank Fire Connection Kit is for use when burying the Promax ENDURO Water Tank 1m in ground. Shipping: This can be delivered free to yo...

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    $2,459.00
  • Promax Dual Tank Fire Service Outlet Kit - 100mm - Rural Water
    $2,554.78

    Promax Dual Tank Fire Service Outlet Kit - 100mm

    promax

    Excluding GST

    The Dual Fire Outlet Kit is required when you wish to interconnect and draw water from both tanks at the same time and both tnaks are above ground...

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    $2,554.78
  • Promax Fire Service Outlet Kit - 100mm - Rural Water
    $1,502.00

    Promax Fire Service Outlet Kit - 100mm

    promax

    Excluding GST

    Promax Fire Coupling Kit is easy to install and Fire Service Approved. This ensures your fire storage water is always ready in an instant. SNZ PAS...

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    $1,502.00
  • Promax Frost Protection Kit - 50mm - Rural Water
    $615.00

    Promax Frost Protection Kit - 50mm

    promax

    Excluding GST

    The Promax frost Protection kit is an internal riser for a ballcock. Internally plumbed it is more insulated from the elements and therefore less ...

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    $615.00
  • Promax Tank Balancing Kit - 50mm - Rural Water
    $341.74

    Promax Tank Balancing Kit - 50mm

    promax

    Excluding GST

    This kit is very easy to install and contains all the 50mm fittings required to install a water balance pipeline between two tanks to allow them t...

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    $341.74
  • Promax Tank Fitting Kit - Rural Water
    $216.00

    Promax Tank Fitting Kit

    promax

    Excluding GST

    The Promax Tank Fitting kit contains all you need for fitting your ENDURO or XPRESS Tank to your pump and water source. Fitting kit contains: 2 x...

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    $216.00
  • Promax Tank Level Indicator - Rural Water
    $304.00

    Promax Tank Level Indicator

    promax

    Excluding GST

    The Promax Tank Level indicator is a simple yet effective method of monitoring the water level in your tank. Running dry can seriously damage your...

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    $304.00
  • Promax Tank Essentials Kit - Rural Water
    Original price $520.00
    Current price $468.00

    Promax Tank Essentials Kit

    promax

    Excluding GST

    Bundle and Save! Everyone needs these tank essentials   Our Accessory Bundles are an easier, and cheaper way of purchasing the accessories you nee...

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    Original price $520.00
    Current price $468.00
  • Promax Tank Cleaning Kit - Rural Water
    Original price $798.26
    Current price $718.00

    Promax Tank Cleaning Kit

    Promax

    Excluding GST

    Bundle and Save! Cleaner Water For Your Home  Our Accessory Bundles are an easier, and cheaper way of purchasing the accessories you need to help ...

    View full details
    Original price $798.26
    Current price $718.00
  • 30,000L Promax Enduro Plastic Water Tank & Fire Coupling Kit - Rural Water
    $5,999.00

    30,000L Promax Enduro Plastic Water Tank & Fire Coupling Kit

    promax

    Excluding GST

    30,000L Promax Enduro Plastic Water Tank & Fire Connection Kit THIS INCLUDES: 30,000L Promax Enduro Tank  North & South Island Model: 36...

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    $5,999.00
  • 30,000L Promax Xpress Plastic Water Tank & Fire Coupling Kit - Rural Water
    Original price $5,700.00
    Current price $5,402.00

    30,000L Promax Xpress Plastic Water Tank & Fire Coupling Kit

    promax

    Excluding GST

    30,000L Promax Xpress Plastic Water Tank & Fire Connection Kit THIS INCLUDES: 30,000L Promax Xpress Tank   North & South Island Model: 3...

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    Original price $5,700.00
    Current price $5,402.00
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