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1800 642 055

Poly Water Tank Models – Shapes and Sizes


When it comes to selecting a rainwater tank to purchase you’ll need to choose a particular model type. If you have open spaces on your property, then maybe a large round water tank will be fine. On the other hand, if you don’t have much space then a slimline tank or two joined together might work better. You can even buy easy-to-install underground poly tanks.

This article will cover a range of tanks that National Poly Industries can supply you with. Our range is quite diverse in both model types and sizes. If you are not quite sure then we would be happy to look at your house plans and make some recommendations.

Round Water TanksRound Water Tanks

Our round water tanks range in sizes from 500L to 47,000L.

Round tank styles are ribbed, which provide greater strength and add a bit of style. The only exception is with our solid smooth profile 1,000L round tank. Our round poly tanks are approved to Australian Standards AS/NZS 4766 which is a certifiable standard that ensures your tank is quality made, and will be able to store water and chemicals under Earth’s normal atmospheric conditions.


Slimline Water Tanks

Our slimline tanks are perfect for residential use and small properties where there is limited space. They are made to perfectly fit narrow spaces, along the side of your ho

use and under windows. If placing them close to your property boundary, then you will need to check with your local council to ensure space requirements between your water tank and property boundary are met.

Depending upon where you are located, we provide two different styles of slimline tanks at 3,000L (660 gallon) and 5,000L (660 gallon) capacities. One style is a smooth-profile with rounded columns, the other is ribbed with multiple holes. These provide slimline tanks with their strength and structural integrity.


If you’d like more information about our poly tank range, our customer care representatives will be happy to help on 1800 642 055.