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Fireguard (1)
BUILT THE WATCO WAY

STI FIREGUARD®

A fire-protected aboveground storage tank featuring double-wall construction and thermal insulation, engineered for fire resistance and safety.

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WATCO TANKS

FIREGUARD® Features:

Fireguard Model for Web

Key Technical Advantages

Design Efficiency

Lightweight thermal insulation material that is approximately 75% lighter than concrete, reducing shipping, installation, and relocation costs compared to traditional fire-protected systems
Durability

A steel outer wall provides protection from weathering and supports low-cost maintenance, delivering long-term durability for aboveground storage applications
Fuel Compatibility

Steel construction ensures compatibility with all hydrocarbons and can be configured for DEF and JetA/AV Gas applications, supporting a wide range of fuel storage requirements
Installation Considerations

Lightweight fire-protective insulation reduces overall tank weight, supporting more efficient shipping, installation, and relocation compared to concrete-insulated fire-protected tanks
Sustainability

Steel construction allows for recycling, supporting environmental sustainability
Built-in Safety

Double-wall construction allows primary and secondary tanks to be tightness tested on-site, and the interstitial space can be monitored for leak detection. Thermal insulation protects stored product from ambient temperature variations, helping reduce emissions
Capacity Range

Available in horizontal designs with capacities of up to 30,000 gallons, with options for compartmentalization to store multiple fuel types
Watco Tanks Strength in Layers

FIREGUARD®

The double-wall fire protected above ground storage tank features an inner steel tank with a unique lightweight thermal insulation material. 

Fireguard Layers-01

FIREGUARD® Design Specifications

Standard Dimensions and Tank Capacities

Diameter Capacity Length +/- 2" Weight +/- 5%
45.5" 1,000 gal 12'-10" 5,000 lbs
72" 5,000 gal 24'-10" 18,000 lbs
96" 5,000 gal 14'-4" 18,000 lbs
96" 10,000 gal 27'-10" 31,000 lbs
96" 12,000 gal 33'-3" 35,000 lbs
120" 12,000 gal 21'-6" 33,000 lbs
120" 15,000 gal 26'-9" 39,000 lbs
120" 20,000 gal 35'-5" 49,000 lbs
120" 30,000 gal 52'-8" 68,000 lbs
Fireguard®

Installation

  • Lightweight thermal insulation reduces shipping, installation, and relocation costs
  • Aboveground configuration supports flexible site placement
  • Primary and secondary tanks can be tightness tested on-site using standard procedures
  • Optional accessories available, including pump platforms, observation ladders, maintenance platforms, catwalks, stairways, and custom fabrications
  • Reliable delivery scheduling with coordinated support
Fireguard for website (1)

Proven Quality Through Independent Oversight

Each FIREGUARD® tank is designed to meet UL 2085, NFPA 30/30A, IFC, CARB, and STI F941 standards, ensuring compliance with fire-protection and aboveground storage regulations. All tanks are backed by STICO Mutual’s 30-year limited warranty.

Watco Tanks undergoes independent third-party inspections by UL and STI, including eight unannounced audits annually. Since the inception of the inspection program over 25 years ago, Watco has maintained a flawless record — one of only three STI-certified manufacturers to do so.

FireGuard Tri-Fold (1)

Fireguard® Guideline Specification

General
  1. Provide Fireguard double-wall Fire-Protected lightweight steel aboveground storage tanks.

Labeling
  1. Tanks shall bear the Steel Tank Institute Fireguard identification label.
  2. Tanks shall bear Underwriters Laboratories UL 2085 label for Protected Tanks.

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's standard for Fireguard Thermally Insulated Aboveground Storage Tanks.
  2. Tanks shall meet the requirements for “protected” tank as defined by the IFC and NFPA 30.
  3. Tanks shall consist of an inner steel wall and an outer steel wall separated by at least 3 inches of insulation.
  4. A lightweight monolithic thermal insulation material shall be placed in the tank’s interstitial space by the manufacturer. The thermal insulating material shall allow liquid to migrate through the interstice to the monitoring point, shall not be exposed to weathering, and shall be protected by the steel secondary containment outer wall.
  5. Integral secondary containment shall be testable and provide access for interstitial leak detection monitoring.
  6. UL-listed supports shall be used for all horizontal and vertical tank(s).
  7. Primary tank to have vent and emergency vent. The secondary tank shall have an emergency vent.

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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