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Emergency Water Storage Tanks

The Self-Rising, Self-Supporting Open Top Onion Tank

onion water tank Popular with firefighting efforts, our Emergency Water Storage Onion Tank (also called pumpkin water tanks and blivets) is the perfect way to quickly store and supply water during emergency events. Designed with an open top, self rising tank walls, and easy access fittings, Hydrostar open top onion tanks can be moved and set up in minutes, making them ideal for any of the following uses:

  • Decontamination
  • Firefighting Efforts
  • Temporary Water Storage
  • Water Relay
  • Mixing Tank
  • Rural or Military Water Storage
  • Hazardous Waste
  • Potable Water Storage
  • Disasters or Emergency Relief & Response (Tsunamis, Tornadoes, Flooding, Hurricanes, Earthquakes) See sizes and dimensions.

Self rising tank ready to go in minutes. Watch how fast and easy!

Typical Onion Water Tank Specifications

Capactiy (Gal) Capactiy (Ltr) Base Dia. Filled Height Type
250 Gallons 946 L 5'10" (1.8 m) 28' (0.7 m) Low Side
500 Gallons 1,893 L 7' (22 m) 30" (0.8m) Low Side
1,000 Gallons 3,785 L 7' (22 m) 32" (0.8 m) Low Side
2,000 Gallons 7,570 L 13' (3.9 m) 32" (0.8 m) Low Side
2,500 Gallons 9,463 L 14'3" (4.4 m) 32" (0.8 m) Low Side
3,000 Gallons 11,355 L 15'3" (4.8 m) 34" (0.8 m) Low Side
6,000 Gallons 22,719 L 21'6" (6.6 m) 33" (0.8 m) Low Side
500 Gallons 1,893 L 5' (1.5 m) 36" (0.9 m) High Side
1,000 Gallons 3,785 L 8'6" (2.6 m) 44" (1.1 m) High Side
1,200 Gallons 4,542 L 9'8" (3.0 m) 44" (1.1 m) High Side
1,600 Gallons 6,056 L 10'9" (3.3 m) 46" (1.15 m) High Side
1,800 Gallons 6,813 L 11' (3.4 m) 48"(1.2m) High Side
2,000 Gallons 7,570 L 14'4" (4.4 m) 48"(1.2m) High Side
2,500 Gallons 9,463 L 12'8" (3.9 m) 48"(1.2m) High Side
3,000 Gallons 11,355 L 14'2" (4.3 m) 48"(1.2m) High Side
10,000 Gallons 37,860 L 19'4" (5.8 m) 80" (2 m) High Side

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

Onion Tank Product Flyer

Onion Tank Installation Instructions

*Additional sizes are available on request

Learn more About Open Top Hydrostar Emergency Water Storage Tanks

onion water tankPortable Onion Tanks, also known as "Blivets" or pumpkin water tanks, have self rising tank walls, are available from 250 to 20,000 gallons, and come with:

  • Floating Foam - no inflation required
  • Heavy Duty PVC Material
    • FDA-approved potable water models available
  • Welded Seams for Long Life
  • Side Support
    • Low or High Side Walls
  • Optional Accessories:
    • Covers
    • Ground Cloth

These flexible tanks are operational in minutes and are used for temporary liquid storage where response time is critical. Use Onion Tanks for water, to store recovered hazardous materials, oil hazardous materials (HAZMAT), and other liquids.

These Emergency Water Storage Tanks can store multiple liquids* including:

  • Water (gray, black)
  • Drinking Water (potable water fabric available upon request)
  • Recovered Crude Oil
  • Jet Fuel from fueling operation*
  • Firefighting Foam
  • Sewage and other Contaminants

*Not all fabrics are suitable for all uses. Please let us know how you plan to use your Onion Tank so we can make sure it's constructed with the right fabric and coating for your specific needs.

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

Emergency Relief & Response: Fast & Easy Emergency Water Storage

self supporting self rising tankThe Emergency Water Storage Tank is made tough and designed with self-supporting walls that rise as the Onion Tank fills with water. When compared to other water storage tanks, these open top Onion Tanks offer the following advantages:

  • Tank Rises as Filled with Liquid
  • Fast Set up on Site
  • Lays Flat for Transport
  • Open Top
  • Large Storage Space
  • Multiple Sizes
  • Folds Quickly for Convenient Storage
  • Sets up in Minutes
  • Self Rising and Self Supporting

For custom sizing or a specific storage application, please call our team at 1-772-646-0597 or fill out our quote request form to discuss your requirements.

Other Resources

Other Emergency Water Tank Resources

Other Helpful Resources for Emergency Water Storage