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STI ACT‐100®

ACT‐100® Steel/FRP composite tank features a strong steel tank for structural integrity and a 100‐mil fiberglass outer coating for long‐lasting corrosion protection. The double-wall design allows continuous interstitial leak detection and monitoring.
WATCO TANKS

ACT-100® Features:

Act 100 1
  • Meets UL 58, UL 1746 and ULC‐S603.1
  • A high‐voltage holiday test of the coating assures that the steel is isolated from corrosive soils
  • Can be used with a variety of leak-detection systems
  • Steel provides complete compatibility with all blends of ethanol and biodiesel fuels
  • Impermeable to all petroleum products and vapors
  • Flat-end design reduces the cost of installation and increases site layout flexibility

Features the Strength of Steel with a 100-mil Fiberglass Outer Coating

Additional Features:

  • Various backfill options allow for money‐saving installation
  • Capacities range up to 40,000 gallons
  • Single or double‐wall construction

ACT-100® Benefits:

  • Steel construction allows for recycling
  • Low-cost compartments and customization
  • Built to nationally‐recognized STI Standards with strict third‐party quality control inspection program
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Protect The Environment - Buy Recyclable Steel Tanks
Compatible with a wide range of fuels and chemicals, including biodiesel and ethanol
Watco Tanks

ACT-100® Double-Wall Underground Steel Storage Tanks

  • Steel Tank Institute ACT-100® and UL Labeled
  • Compatible with alternative fuels
  • Low cost compartments and customization
  • Flat ends reduce installation costs
  • Provides safe and effective secondary containment
  • Capacities range up to 40,000 gallons
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ACT‐100® Guideline Specification

General
  1. Provide ACT‐100® external corrosion-protected FRP composite steel underground storage tanks.

Labeling
  1. Tanks shall bear the Steel Tank Institute ACT‐100® label.
  2. Underground tanks shall bear the appropriate Listing label.

Manufacturer
  1. The manufacturer shall be a licensed member company of the Steel Tank Institute and subject to Steel Tank Institute’s Quality Assurance program.
Product Description
  1. Tanks shall be manufactured following Steel Tank Institute ACT‐100® Specification for External Corrosion Protection of FRP Composite Steel Underground Storage Tanks.
  2. Tanks shall be manufactured and listed per Underwriters Laboratories UL 58, Steel Underground Storage Tanks for Flammable and Combustible Liquids and UL 1746, External Corrosion Protection Systems for Steel Underground Storage Tanks or ULC‐S603.1, Standard for Corrosion Protection for Steel Underground Tanks for Flammable and Combustible Liquids.
  3. Double‐wall tanks shall provide testable secondary containment on site and access for interstitial leak detection monitoring.
  4. Tanks shall have a minimum 100‐mils of an approved FRP laminate on the tank exterior.
  5. Tanks shall be factory tested with a high‐voltage holiday test.

Trusted Watco Tanks Affiliates

Watco Tank Manufacturing Shot

Top U.S. Producer of STI Technologies

Watco Tanks was recognized as the largest U.S. producer of STI Technologies in 2021 and the second-largest worldwide, with over 5 million gallons built in 2021 and over 6 million gallons each in 2022 and 2023.

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