Underground Fiberglass Double Wall Fuel Storage Tanks

Double Wall Fuel Tanks

Your assurance of quality...

ZCL Composites Inc. is the most trusted name in the petroleum industry for providing environmentally safe products. Our underground double wall fuel storage tanks are the benchmark for today’s higher standards of environmental protection.

Quality Design – Standard Features

  • Unsurpassed fibreglass double wall fuel tanks construction using 100% premium resins and glass.
  • Integral ribs made of the same material as the tank add strength.
  • Maintenance free, they require no corrosion maintenance or monitoring.
  • Each tank can be removed, and after recertification can be re-installed.
  • Lightweight design – easy to ship, easy to handle and install.
  • Interstitial design using three-dimensional glass fabric allows for four monitoring pressure, vacuum, dry, or hydrostatic.
  • Compatible for up to 100% ethanol.

Specifications for Double Wall Fuel Tank

  • Tank capacities range from 2,500 litres to 110,000 litres in 4’, 6’, 8’6” and 10’ diameters (see gauge charts for details).
  • Standard 4” NPT fittings.
  • Engineered to withstand H-20 axle loading of 32,000 lbs per axle.
  • Burial depth up to seven feet in wet or dry soil condition (see installation manual for details).
  • Available in metric sizes and optional imperial sizes.

Quality Controls

Every tank conforms to the Underwriters’ Laboratories of Canada (ULC) Standard for Reinforced Plastic Underground Tanks for Flammable and Combustible Liquids (ULC S-615). All double wall tanks are subjected to stringent quality control processes that ensure tank tightness, both before and after installation. These quality control processes include a variety of in-process checks in addition to a positive air pressure test of 5psi and vacuum test in accordance with ULC requirements


All double wall tanks are backed by a limited 30 year warranty.

Please consult a ZCL representative for more details on double wall fuel tanks.