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:

  • Temporary Water Storage
  • Rural or Military Water Storage
  • Hazardous Waste
  • Potable Water Storage
  • Disasters or Emergency Relief & Response

Self-Rising Tank - Ready to Go in Minutes

Low Side Onion Water Tank Specifications

Capacity (Gal) Capacity (Ltr) Base Diameter Filled Height
250 Gallons 946 L 5'10" (1.8 m) 28" (0.7 m)
500 Gallons 1,893 L 7' (2.1 m) 32" (0.8 m)
750 Gallons 2,839 L 8'4" (2.5 m) 33" (0.8 m)
1,000 Gallons 3,785 L 9'5" (2.9 m) 33" (0.8 m)
1,500 Gallons 5,678 L 11'9" (3.6 m) 32" (0.8 m)
2,000 Gallons 7,570 L 13' (3.9 m) 32" (0.8 m)
2,500 Gallons 9,463 L 14'3" (4.4 m) 32" (0.8 m)
3,000 Gallons 11,355 L 15'3" (4.8 m) 34" (0.9 m)
5,000 Gallons 18,927 L 18'2" (5.5 m) 33" (0.8 m)
6,000 Gallons 22,712 L 21'6" (6.6 m) 33" (0.8 m)
10,000 Gallons 37,854 L 26'9" (8.2 m) 33" (0.8 m)

High Side Onion Water Tank Specifications

Capacity (Gal) Capacity (Ltr) Base Diameter Filled Height
500 Gallons 1,893 L 5' (1.5 m) 36" (0.9 m)
1,000 Gallons 3,785 L 8' (2.4 m) 44" (1.1 m)
1,600 Gallons 6,056 L 9' (2.7 m) 44" (1.1 m)
1,800 Gallons 6,813 L 9' (2.7 m) 46"(1.2 m)
2,000 Gallons 7,570 L 11'9" (3.6 m) 48"(1.2 m)
2,500 Gallons 9,463 L 12'8" (3.9 m) 48" (1.2 m)
3,000 Gallons 11,355 L 14'2" (4.3 m) 48" (1.2 m)
5,000 Gallons 18,927 L 16'2" (4.9 m) 60" (1.5 m)
6,000 Gallons 22,712 L 16'2" (4.9 m) 65" (1.7 m)
8,000 Gallons 30,283 L 19'5" (5.9 m) 65" (1.7 m)
10,000 Gallons 37,854 L 19' (5.8 m) 80" (2 m)

*Additional sizes are available on request

Onion Tank Fabric Options

  • 22 oz. Yellow PVC (up to 2,500 gallons)
  • 40 oz. Black PVC
  • 30 oz. Black Elvaloy
  • 30 oz. PW Blue Elvaloy

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

Learn more About Open Top Hydrostar Emergency Water Storage Tanks

Portable Onion Tanks, also known as blivets or pumpkin water tanks, have self-rising tank walls, sizes from 250 to 10,000 gallons, and come with:

  • Floating Foam - no inflation required
  • Heavy Duty PVC Material (Black or Yellow)
    • 30 oz. Black or PW Blue Elvaloy available
  • Welded Seams for Long Life
  • Side Support
    • Low or High Side Wallsonion water tank
  • 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*
  • 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