Open Top Onion Water Tanks

DOOWIN onion water tank is circular shaped low profile self-supporting open top bladders used for water storage, firefighting, and disaster relief efforts. The self-rising floating collard is made of either closed cell foam or air-filled. 

Collapsible onion water tank is a flexible open-top storage tank popular with military and fire fighting applications. The onion water tank can be moved easily and quickly deployed on site making them an ideal solution for short term storage of potable and non-potable water. In remote areas these tanks are designed for standby water containment, water shuttling situations and provide a continuous portable water supply. The onion water tank also can be used for temporary or long term storage of oil, sewage, chemical spillage waste, and other liquids.

We produce this collapsible onion water storage tanks with heavy duty special application PVC/TPU coating fabric, which can be used in many different environments for bulk liquid storage and transportation. The raw material is certificated by SGS.

Onion Water Tank Specification

The standard open top onion water tanks capacity is from 1ton to 50ton. We also can make any customized size upon request.
* The below size only for reference. The standard size is upon our drawing.

onion water tanks specification

onion water tanks

onion water tanks


Certificated quality for drinking water. Our fabric material is certificated comply with NSF/ANSI 61 drinking water standard. No taste or odor. Suitable for long-term storage potable drinking water.

We use the top quality fabric material for drinking water, which is NSF/ANSI 61 certificated. For the details material performance, please feel free to contact us.

We will provide buyers manufacturer certificate free of charge. We also can provide third party certificate upon customer’s request.

We have different design for different storage requirements. There are 3 years, 5 years, 7 years, 10 years design. But it also is based on the application environment.

We provide warranty period for 2 years.

We can make any customized size and shapes. Please feel free to contact us order your own specific water tanks.