Plastic Water Storage Tanks
Save water and money through our range of rainwater tank sizes
As water becomes increasingly scarce, more and more Australians are installing plastic water storage tanks in order to conserve rainwater for everyday use. Whether you’re likely to use rainwater to wash the car, the clothes or the dog, WaterStore Poly Tanks offers a range of plastic tanks in a range of sizes, from the slimline water tank, to a 5000 litre rainwater tank that is ideal for a larger backyard, to the even larger 5000 gallon poly water tank!
Browse our range of plastic water storage tanks at the best prices to find the one that best suits your needs. Our straight wall tanks will ensure that the collected water remains clean and fit for use. Whether you live in Melbourne, Adelaide, Sydney or Brisbane, we will happily deliver and install at your home. For the widest variety of rainwater tank sizes and high quality plastic water tanks for sale, there is only one name to trust in Australia – WaterStore Poly Tanks.
Check out the range of colours here!
All our Polyethylene Water Tanks have Australian Standards Certification. For Licence numbers for rebates, please go to our FAQ which lists these.
33,750 Litre (7,500 gallon) Poly Water Tank
The largest Tank in Water-Store's Poly Tank range. Ideal for storage of sheds and used for supplying complete house & garden
Size: 4.22m Width x 2.43m Inlet Height, 2.85m Apex Height
Fittings supplied as standard: 1 x 40mm outlet & ballvalve, 1 x 90mm overflow and 1 x strainer.
22,700 Litre (5,000 gallon) Poly Water Tank
The most economical of all tanks for home or farm storage.
Size: 3.50m Width x 2.36m Inlet Height, 2.7m Apex Height
Fittings supplied as standard: 1 x 40mm outlet & ballvalve, 1 x 90mm overflow and 1 x strainer.
10,000 Litre (2,220 gallon) Poly Water Tank
The handy dimensions of this tank make it an ideal choice where smaller roof areas or confined spaces make larger tanks unnecessary or impractical.
Size: 2.57 Width x 2.09m Inlet Height, 2.33m Apex Height
Fittings supplied as standard: 1 x 25mm outlet & ballvalve, 1 x 90mm overflow and 1 x strainer.
9,000 Litre (2,000 gallon) Poly Water Tank
The handy dimensions of this tank make it an ideal choice where smaller roof areas or confined spaces make larger tanks unnecessary or impractical.
Size: 2.57m Width x 1.92m Inlet Height, 2.12m Apex Height
Fittings supplied as standard: 1 x 25mm outlet & ballvalve, 1 x 90mm overflow and 1 x strainer.
5,000 Litre (1,100 gallon) Poly Water Tank
The handy dimensions of this tank make it an ideal choice where smaller roof areas or confined spaces make larger tanks unnecessary or impractical.
Size: 1.74m Width x 2.20m Inlet Height, 2.5m Apex Height
Fittings supplied as standard: 1 x 25mm outlet & ballvalve, 1 x 90mm overflow and 1 x strainer.
5,000 Litre (1,100 gallon) Slimline Poly Water Tank
Size: 0.95m Width x 3.23m Length x 2.1m Height
Fittings supplied as standard: 1 x 25mm ball valve, 1 x 90mm overflow and 1 x strainer.
4,500 Litre (1,000 gallon) Squat Poly Water Tank
This tank is used as a drinking water tank on stands for low-pressure systems made to replace the short lived galvanized iron tanks seen on many older properties.
Size: 2.13m Width x 1.24m Inlet Height, 1.51m Apex Height
Fittings supplied as standard: 1 x 25mm outlet & ballvalve, 1 x 90mm overflow and 1 x strainer.
4,500 Litre (1,000 gallon) Tall Poly Water Tank
This tank is often the choice for town or country drinking water.
Size: 1.75m Width x 1.87m Inlet Height, 2.05m Apex Height
Fittings supplied as standard: 1 x 25mm outlet & ballvalve, 1 x 90mm overflow and 1 x strainer.
4,000 Litre (880 gallon) Slimline Poly Water Tank
Size: 0.89m Width x 2.9m Length x 2.1m Height
Fittings supplied as standard: 1 x 25mm ball valve, 1 x 90mm overflow
3,000 Litre (660 gallon) Slimline Poly Water Tank
Small diameter tanks ideal for those narrow spaces and no stand required
Size: 0.78 Width x 2.40m Length x 2.2m Height
Fittings supplied as standard: 1 x 25mm outlet & ballvalve, 1 x 90mm overflow and 1 x strainer.
2,700 Litre (594 gallon) Slimline Poly Water Tank
Size: 0.74m Width x 2.34m Length x 2.1m Height
Fittings supplied as standard: 1 x 25mm outlet and ball valve, 1 x 90mm overflow and 1 x strainer
2,250 Litre (500 gallon) Poly Water Tank
This tank is used for fresh drinking water on farm or in town.
Size:1.32m Width x 1.65m Inlet Height, 1.85m Apex Height
Fittings supplied as standard: 1 x 25mm outlet & ballvalve, 1 x 90mm overflow and 1 x strainer.
2,000 Litre (440 gallon) Round Poly Water Tank
Size: 1.22m Width x 2.02 Inlet Height, 2.13m Apex Height 
Fittings supplied as standard: 1 x 25mm outlet & ballvalve, 1 x 12mm outlet and lever action tap, 1 x 90mm overflow and 1 x strainer.
2,000 (440 gallon) Slimline Poly Water Tank
Restricted for space? Ideal for narrow areas between the shed and fence!
Size: 0.65m Width x 2.19m Height x 2.08m Length
Fittings supplied as standard: 1 x 25mm outlet & ballvalve, 1 x 12mm outlet & lever action tap, 1 x 90mm overflow and 1 x strainer.
2,000 Litre (440 gallon) Slimline Squat Poly Water Tank
Size: 0.75m Width x 2.9m Length x 1.2m Height
Fittings supplied as standard: 1 x 25mm outlet & ballvalve, 1 x 90mm overflow and 1 x strainer.
1,350 Litre (297 gallon) Slimline Poly Water Tank
Size: 0.67m Width x 2.19m Length x 1.2m Height
Fittings supplied as standard: 1 x 25mm ball value (outlet is moulded into tank), 1 x 12mm lever action tap (outlet is moulded into tank), 1 x 90mm overflow and 1 x strainer.
1,000 Litre (220 gallon) Trim Poly Water Tank
Small diameter tanks ideal for those narrow spaces and no stand required
Size: 0.80m Width x 1.93m Inlet Height, 1.93m Apex Height
Fittings supplied as standard: 1 x 25mm outlet & ballvalve, 1 x 12mm outlet & lever action tap, 1 x 90mm overflow and 1 x strainer.
900 Litre (200 gallon) Poly Water Tank
This tank is generally suitable for drinking water for a medium sized family.
Size: 0.95m Width x 1.30m Inlet Height, 1.42m Apex Height
Fittings supplied as standard: 1 x 12mm outlet & lever action tap, 1 x 90mm overflow and 1 x strainer.
400 Litre (90 gallon) Poly Water Tank
Suitable for drinking water for the small family, not suitable for plumbing to sinks.
Size: 0.78m Width x 0.87m Inlet Height, 0.87m Apex Height
Fittings supplied as standard: 1 x 12mm outlet & lever action tap, 1 x 90mm overflow and 1 x strainer.
335 Litre (75 gallon) Trim Poly Water Tank
Small diameter tanks ideal for those narrow spaces and no stand required
Size: 0.50m Width x 1.80m Inlet Height, 1.80m Apex Height
Fittings supplied as standard: 1 x 25mm outlet & ballvalve, 1 x 12mm outlet & lever action tap, 1 x 90mm overflow and 1 x strainer.
225 Litre (50 gallon) Poly Water Tank
This tank is generally used as a header tank or for small capacity water storage on sheds, holiday shacks or for camping purposes.
Size: 0.60m Width x 0.85m Inlet Height, 0.85m Apex Height
Fittings supplied as standard: 1 x 12mm outlet & lever action tap, 1 x 90mm overflow and 1 x strainer.