Onion Tanks


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Ready Onion Tanks

Onion Tanks are self-supporting frameless, collapsible, collared tanks that are the industry standard for water relay for fire fighting. and military drinking water systems. Also referred to as pumpkin tanks or dip tanks. Our tanks are used by the fire department, Forestry Service, and the military today. These open-top can be made to a mil-spec like our Zipper Top Onion Tanks, NSF 61 approved, and with other industrial fabrics. Ready Onion Tanks come standard with a 2” input/outlet valve that facilitates the filling and removal of liquid. Our ISO 9001:2015 certified QMS helps to ensure each of our tanks is manufactured to exacting standards.

Additionally, we pride ourselves on providing high-quality long-lasting flexible tanks, spill berms, and more. Ready Onion tanks are designed and constructed so tough. That we can back them with a * 5-year manufacturer’s warranty. Ready Containment is a leading supplier of onion tanks for military, industry, fire fighting, rainwater collection, and other civilian use. Ready Onion Tanks are for use with fire fighting water, potable water, non-potable, and other non-hazardous liquids. Call one of our flexible containment experts to discuss your primary and secondary containment needs.

We also offer Military Zipper Top Onion Tanks that are completely sealed with a liquid and airtight zipper.


  • Tanks are compact and portable
  • No Assembly required.
  • No Loose Parts
  • Frames
  • Provides quick and easy containment for water and other non-hazards liquids
  • Custom sizes available.
  • Also available in PVC, Urethane, and NSF approved Fabrics

Industries used

  • Spill Response
  • Hazmat Operations
  • Military Operations
  • Potable (drinking) Water Tank
  • Disaster Relief *
  • Fuel Storage
  • Firefighting
  • Forestry Service
  • Wastewater
  • Portable Storage
  • Remote Storage
  • Gray Water Storage
  • Portable Water Tank
  • Chemical Storage
  • Remediation Projects

Size Chart

CapacityBase Diameter FilledCollar Diameter FilledFilled HeightWeight

Dimensions on tank sizes can vary a little depending on the application, the fabric used, and/or military spec. We offer custom tanks so if you do not see what you need give us a call or drop us a note.