Onion Tanks - Temporary Liquid Storage

Simple to Set Up, Reuseable, and Affordable

For dependable temporary water storage, count on Hydrostar Onion Tanks by GEI Works. Designed for convenience and ease of use, Hydrostar self-rising onion tanks can be set up in just minutes. The open top design facilitates quick filling, while the easy access fittings make emptying the tank simple and quick. Since they're built to last, the Hydrostar Onion Tank can be used again and again.


Questions? Call the GEI Works team and ask about our onion tanks at 1-772-646-0597 or request pricing.

Hydrostar Self-Rising Onion Tank Fills in Minutes

Perfect for any temporary water storage use, Hydrostar Onion Tanks require virtually no set-up, and rise as they fill. They empty just as easily, with a port built into the base for convenient drainage. When not in use, these collapsible water storage tanks fold up tightly for easy storage. Onion tanks are useful for a wide variety of applications including: construction water storage, secondary containment, military water storage, firefighting, and for a mixing tank. The onion tanks are also commonly used to hold water during cleaning, servicing, or repairing of hot tubs and pools.

Much safer and more durable than inflatable water tanks, Onion Tanks are more stable and designed for repeated use. While they're just as portable as inflatable water tanks, they're much easier to use and save a significant amount of time on the job site. Because they rise on their own as the tank fills, there's no additional step for inflation. Likewise, they automatically collapse as they empty.

Made from heavy duty PVC fabric and quality components, the Hydrostar Onion Tank is built with pride in workmanship and will satisfy you with its long service use life. Call us for a free quote today!

Questions about inflatable water tanks? We can help! Call the GEI Works team at 1-772-646-0597 or fill out our quote request form to discuss your requirements.

Hydrostar Self-Rising Onion Tank Specifications

These collapsible water storage tanks are so simple to set up and break down, you'll be delighted with how easy they are to use. (See our Onion Tank Installation Instructions.) Then, when your job is done, the tank collapses for convenient transportation and storage.

Each Hydrostar Onion Tank is made to order, to your specifications. Choose from either a low-side design model, or a high-side design model to fit your temporary water storage needs. (Dimensions listed below).

Additional customization options include:

  • Capacity: 250 gallons to 10,000 gallons
  • Heavy-duty PVC or Elvaloy fabric choices available
  • Fabric coating choices include potable water, non-potable water, fuel, and others
  • Convenient travel/storage bag
  • Optional tank lid
  • Accessories: Protective ground cloth, lever controlled discharge port, high capacity discharge hose, repair kit, pump

Hydrostar Onion Tank Specifications: Low-Side Model Design

Capacity Dimensions Low-Side Onion Tank
250 gallons 5' 10" Base, 28" Height (Filled)
500 gallons 7' Base, 32" Height (Filled)
750 gallons 8' 4" Base, 33" Height (Filled)
1,000 gallons 9' 5" Base, 33" Height (Filled)
1,500 gallons 11' 9" Base, 32" Height (Filled)
2,000 gallons 13' Base, 32" Height (Filled)
2,500 gallons 14' 3" Base, 32" Height (Filled)
3,000 gallons 15' 3" Base, 34" Height (Filled)
5,000 gallons 18' 2" Base, 33" Height (Filled)
6,000 gallons 21' 6" Base, 33" Height (Filled)
10,000 gallons 26' 9" Base, 33" Height (Filled)

Hydrostar Onion Tank Specifications: High-Side Model Design

Capacity Dimensions High-Side Onion Tank
500 gallons 5' Base, 36" Height (Filled)
1,000 gallons 8' Base, 44" Height (Filled)
1,600 gallons 9' Base, 44" Height (Filled)
1,800 gallons 9' Base, 46" Height (Filled)
2,000 gallons 11' 9" Base, 48" Height (Filled)
2,500 gallons 12' 8" Base, 48" Height (Filled)
3,000 gallons 14' 2" Base, 48" Height (Filled)
5,000 gallons 16' 2" Base, 60" Height (Filled)
6,000 gallons 16' 2" Base, 65" Height (Filled)
8,000 gallons 19' 5" Base, 65" Height (Filled)
10,000 gallons 19' Base, 80" Height (Filled)

For a full listing of options and product details, please see: Hydrostar Onion Tank Specifications (PDF).

Additional Collapsible Water Storage Tank Options

While the Hydrostar Onion Tank is the most popular tank for temporary water storage for hot tub cleaning and servicing, we manufacture other quality collapsible water storage tank options that will get the job done also. Each style has its own benefits and specific applications: Collapsible Water Storage Tanks.

For water transportation, consider the Argo Water Hauling Trailers, another economical and well-built water storage solution by GEI Works. Argo water trailers are delivered road ready, DOT Compliant, and boast a host of features that make them flexible for a wide range of uses.

Questions? We can help! Call the GEI Works team at 1-772-646-0597 or fill out our quote request form to discuss your requirements.