FAQs

The friendly team at Capital Tanks welcome any questions that you may have. Please feel free to contact us on 1300 476 399 or info@capitaltanks.com.au

Whether it's a question about our products in particular, or about rainwater harvesting and re-use in general, we're here to help.

At Capital Tanks we're committed to providing you with all of the information that you require to make an informed decision when it comes to your rainwater harvesting and re-use needs.  

Please find below some commonly asked questions about Capital Tanks, rainwater tanks and rainwater harvesting in general along with our answers.
Why choose Capital Tanks?

As well as a total commitment to providing our customers with value, quality and expertise when it comes to their water tank needs, there are a few standout points that we believe that our customers appreciate.

Capital Tanks does not require an upfront deposit on tank purchases. It’s simply a case of payment upon delivery. There is no risk for our customers.

Capital Tanks provides free delivery of all water tanks (big or small) to site throughout Southern Queensland and Northern New South Wales. Please click here for a full run down on our delivery area. 

All tanks supplied by Capital Tanks are fully backed by a comprehensive, 100% ‘fix or replace’ guarantee. Peace of mind is assured.

All tanks supplied by Capital Tanks are proudly manufactured in Australia. Capital Tanks is 100% Australian owned and operated.

Capital Tanks friendly staff possess unparalleled experience in the rainwater harvesting and re-use industry.

The Capital Tanks range of quality tanks are available in an industry leading range of colours. Your new tank will be sure to match your overall project.

Which tank best suits your needs?

There are two key factors to consider when selecting a tank that best suits your particular requirements.

1. Available Space (usually in proximity to roof downpipes). Given the tremendous rainwater harvesting potential of even the smallest roof area, we would recommend the largest water tank possible given both the ground space and height available. Water storage capacity (capturing free rainwater) is the reason most people purchase a water tank. It’s also important to keep in mind that rainfall isn’t necessarily consistent. It’s best to catch as much of it as possible when it’s available. Please refer to our Products listings for the exact dimensions of our various water tanks.

2. Access to the Proposed Tank Location. Following your answer to the question above, can the tank that you have in mind be moved into the end location? Are their gate widths and other obstacles to consider?

Of course, the expert team at Capital Tanks are here to help with any questions you may have regarding your particular requirements. Please don’t hesitate to call them on 1300 476 399 or email them at info@capitaltanks.com.au.

What payment methods does Capital Tanks accept? 

It’s important to us that purchasing your rainwater tank is as simple and convenient as possible. Accordingly, we offer a number of different payment methods:
      Credit Card (Visa and Mastercard)
      Electronic Funds Transfer (EFT)
      Cheque (simply handed to our delivery driver upon your tank’s delivery)

Are Capital Tanks tanks made of separate parts ‘welded’ together?

No. For superior strength, aesthetics and overall quality, all poly tanks supplied by Capital Tanks are a one piece tank, manufactured utilising the latest rotational moulding technologies.

Do Capital Tanks tanks meet the Australian Standard?

Yes. All Capital Tanks poly tanks, both round and slimline, are manufactured and quality assured in strict accordance with the Australian Standard (AS4766:2006). For further details on the Australian Standard (AS4766:2006), simply contact the friendly Capital Tanks team on 1300 476 399 or email them at info@capitaltanks.com.au. Quality is something that we take very seriously. 

What is ‘poly’ when it comes to water tanks?

‘Poly’ is an abbreviation of polyethylene (PE), which is a robust, chemical resistant thermopoly (plastic). In accordance with the Australian Standard (AS4766:2006), all poly water tanks supplied by Capital Tanks are manufactured from virgin, food-grade polyethylene specifically for the containment of potable (drinking water) water.

Unlike some plastics (e.g., cheap polycarbonates), which are designed for a disposable, short life span, polyethylene water tanks are completely free of Bisphenol A (BPA).

Due to its safety and remarkable longevity, polyethylene has grown to be the leading material for water tanks in Australia.

How much rainwater am I likely to capture with my tank?

The following link leads to some very useful information and an online calculator that takes into consideration roof area and average rainfall to determine how much rainwater can be captured per annum.


The following are the yearly average rainfall amounts (calculated from 2003 to 2014 by the Bureau of Meteorology) for some of Southern Queensland's population centres.

Brisbane     991mm
Bundaberg     1029mm
Gladstone     941mm
Gold Coast     1276mm
Gympie     1127mm
Hervey Bay     1088mm
Logan     1086mm
Mackay     1563mm
Maryborough     1141mm
Rockhampton     814mm
Sunshine Coast     1477mm
Towoomba     731mm
Warwick     683mm

You’ll be surprised by how much free rainwater you could be catching!

Water Tanks, Round Poly Rainwater Tanks, Slimline Poly Rainwater Tanks, Steel Tanks, Water Pumps, Water Tank Accessories.Queensland, Brisbane, Gold Coast, Sunshine Coast, Logan, Moreton Bay, Gympie Region, South Burnett, Fraser Coast Region, Lockyer Valley, Scenic Rim, Ipswich, Toowoomba, Southern Downs, Western Downs. New South Wales, Northern Rivers.
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