​​Engineered and Packaged Equipment

Underground Tanks

Basiia durable underground storage tanks are proudly manufactured in the U.S.A. to survive the tough underground elements. Our underground tanks are EPA approved and meet UL® 58 standards. The STI-P3® and ACT-100-U® double wall tanks are designed to protect the environment while providing the end-user a piece of mind that they are purchasing an underground storage tank that exceeds even the highest industry standards.

We offer steel single wall and double wall underground tanks up to 30,000 gallons. Steel tanks are stronger than fiberglass and are less dependent on the quality of backfill to keep the tank sound. Underground steel tanks have a proven compatibility with a wide variety of fuels, chemicals, and additives, including petroleum products blended with methanol and ethanol. Choose from an ACT-100U or STI-P3, offering a standard 10 year warranty with an option for an additional 20 years, or a basic tar-coated underground tank (available where local codes allow). Our underground tanks are built and tested to Underwriters Laboratories specification standards.


ACT-100-U® Double Wall Tanks
ACT-100-U® Single Wall Tanks
STI P3® Double Wall Tanks
STI P3® Single Wall Tanks
UL® 58 Underground Tanks