Call Us: 555-555-1234

Fire Fighting Onion Tanks

Hydrostar Onion Water Tank

onion water tankOpen Top Onion Tanks are a great option for fire suppression water storage in any rural or remote location. Specifically designed with these applications in mind, these tanks are fast to set up and easy to transport to and from various facilities.

One advantage of these tanks over similar models is their ability to rise on their own as the tank fills with liquid. This keeps their profiles low until desired times of need. Onion tanks are available in sizes up to 10,000 gallons for bulk liquid storage requirements during times of need.

Self Supporting Onion Water Tanks are available in both a high side and low side designs. The low side tank will be wider in diameter and lower in profile, while the high side models will be slightly more vertical.

Questions? We can help! Call us at: +1-772-646-0597 or request a quote to discuss your project.

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)

*Custom Sizes for Onion Tanks are Available Upon Request


Give us a call at +1-772-646-0597 or fill out our quote request form to discuss your onion water tank requirements.

Onion Tank Features

  • self supporting onion tanksSelf Rising Foam Collar
  • 22 oz. Yellow or 40 oz. Black PVC
  • 30 oz. Black or PW Blue Elvaloy Also Available
  • Self-Suporting Walls
  • High Side or Low Side Walls


Onion Tank Benefits

  • Open Top for Easy Hose Access
  • Quick Fill by Helicopters or Water Trucks
  • Fast Setup on Site
  • Lies Flat when Empty

Additional Fire Suppression tanks include the following: Folding Frame Tanks, Double Fold Frame Tanks. For more information, check out our Fire Fighting Water Tanks.

Onion water tanks can also be used in a range of other water storage applications including use for spas, pools, industrial water storage, drinking water storage and more. Learn more about our Onion Water Tanks.