Flexitank onion tanks are a collapsible flexible tank, which when filled, is self-erecting. Flexitank Australia offer two types of onion tanks: open top onion tanks with floating foam filed collars, and roll top enclosed lid onion tanks.
Flexitank offers the largest range of onion tanks available anywhere in the world. With capacities ranging from 1200 litre (317 USG), to 120,000 litres (31,700 USG) – the BIGGEST onion tank in the world – there is not a purpose or an application that our onion tanks do not suit.
Our onion tanks are the perfect solution for a variety of temporary liquid storage requirements and can be manufactured from a variety of polymer fabrics to suit virtually any application.
Onion tanks are primarily designed for applications where rapid deployment is required with minimal set up time:
- Drinking water – emergency aid relief, potable mains water replacement
- Temporary liquid storage for repairs and maintenance of another liquid holding device (tanks, swimming pools, ponds)
- Temporary containment of almost any liquid (waste water clean-up, oil spill, chemical spills, decontamination)
- Spill containment and water filtering
- Frac tanks for hydraulic fracturing
- Bushfires & fire fighting, helicopter refills
- Rainwater harvesting
- Short term construction site liquid storage
- Military requirements
Onion tanks are offered in an 20 standard sizes that cover almost any liquid storage application:
For open top onion tanks, add 120mm to the height for the filled height of the onion tank including the floating foam collar.
Please note closed top onion tank are available in capacities from 1,000 – 15,000 litre options only.
All onion tank dimensions are listed as standard sizes supplied from Flexitank’s exclusively sourced Aqualine 850gsm TPO polymer fabric.
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Check out Flexitank onion tanks in action:
120,000 litre onion tank
The largest onion tank available anywhere in the world!
5,000 litre onion tank
5,000 litre onion tank full
10,000 litre onion tank
10,000 litre onion tank being used in spill control
15,000 litre open top onion tank
15,000 litre open top onion tank in Congo, Africa
15,000 litre open top onion tank
15,000 litre open top onion tank in Congo, Africa
Packed 5,000 litre onion tank
Packed 5,000 litre onion tank | the ground sheet also acts as a carry bag when packed down.
20,000 litre closed top onion tank
Beige 20,000 litre closed top onion tank
20,000 litre closed top onion tank
20,000 litre closed top onion tank
Open top diesel fuel onion tank
Open top diesel fuel onion tank
12,000 litre closed top onion tank
12,000 litre closed top onion tank
920gsm pvc onion tank
5,000 litre potable water onion tank
5,000 litre potable water onion tank
Flexitank onion tanks provide an array of advantages unique to this style of flexible tank:
Very quick setup time
Most Flexitank onion tanks take 1 – 4 people between 5 and 10 minutes to setup
No frame or parts to assemble
simply unfold the tank and begin filling
100% self-supporting
Easy to pack down and fold away
Flexitank Australia’s design incorporates a reinforced ground sheet which doubles as a carry bag
The nature and shape of a Flexitank Australia onion tank means they have the ability to fill and empty at a much faster rate than that of a pillow tank
Flexitank Australia’s design incorporates a reinforced ground sheet which doubles as a carry bag
By utilising a greater height than that of a pillow tank, and onion tank will typically use approx. 25% less ground space to achieve its desired capacity
Flexitank Australia’s unique heavy duty construction makes our range of onion tanks suitable for a large variety of unique and difficult applications
Can handle ground inclines of up to 10 degrees
Open top tanks are supplied with a full cover
This protects the liquid being stored from dust and contaminants, which is very important in potable drinking water applications
Closed top roll top onion tanks offer 100% contamination protection for the liquid being held as well as additional liquid security
a vital aspect when holding sensitive liquids
Manufactured by Flexitank Australia to defence specifications using the latest welding technologies
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