Fortress Panel Water Tanks


Fortress Panel Tanks are a highly versatile and robust storage system, offering many benefits over traditional concrete tanks. With customisable size options, with diameters from 4.3 to 38.1m, and heights from 2 to 11m, the tanks offer up to 12,535m³ of storage in a single tank. Manufactured from a unique composition of fiberglass and resins giving them very high mechanical and corrosion resistance, these tanks offer an impressive 50-year design life.


Ideal for general water storage, Fortress Panel Tanks are also well suited to water treatment applications as well as the storage of a range of chemicals. Fast to erect, and able to be installed above ground, indoor, or partly buried underground, and with an array of accessories, the Fortress system provides incredible flexibility and reliability. Further, due to the unique design of the tanks, they can also be disassembled after use and transported for reuse at another location, providing even greater flexibility.


The Fortress Panel Tank System is ideal for a wide array of liquid storage and water treatment needs, including:

  • Water treatment
  • Wastewater storage
  • Potable water storage
  • Fire protection water storage
  • Desalination storage
  • Irrigation storage
  • Chemical storage (download brochure for more information).

Tanks feature:

  • Steel circular, closed top panel tank
  • Unique rigid, scalloped roof with bracing
  • Tank interior coated with isophthalic resin or vinylester finish
  • Unique composition of high fiberglass and resins
  • Rust and corrosion resistant components
COlour OPtions
  • Light Grey – RAL 7035 (standard)
  • Yellow-Green – RAL 6018
  • Light Blue – RAL 5012
  • Mouse Grey – RAL 7005
Fastenings & LADDER/S 
  • Fastening for Gasometer and Membranes
  • Galvanised access ladder
  • Caged access ladder with platform for tanks over 5.95 metres high
  • Access Window in Cover
  • Manway
  • GRP Flange
  • Single Flange
  • Double Flange
  • Mixer Mount
  • GRP Pipe Mount
  • 29 m³ – 12,535 m³
  • Larger capacities provided using multiple tanks

The Fortress Tank System is is Certified to NSF/ANSI/CA 61 for potable water use. Components are manufactured to the highest international quality standards for Protex Water in Spain, and assembled and installed by our specialist Protex Water Tank Team.

All workmanship is completed in accordance with best practice. AKS also carries ISO certification for 14001 Environmental Management and 45001 for OH&S Management.


Fortress Tanks are engineered to be easy to install and maintain. They are constructed from prefabricated sections on-site, and Protex Water offers you a comprehensive installation service to ensure your tanks and fire system is commissioned in the shortest possible time-frame.

In addition, due to the unique design, tanks can be disassembled after use and transported for reuse at another location, providing even greater flexibility and value.


Fortress Tanks require routine inspections and maintenance at scheduled intervals to meet standard requirements. If you opt for a Scheduled Maintenance Plan with Protex Water, we will manage your inspections and maintenance service requirements ensuring your asset remains in premium operating condition.

Fortress is our specialist brand of fiberglass/resins panel tanks, built in a circular configuration. Specifically designed for industrial applications, Fortress Tanks are built to last, with a service life of up to 50 years.

Protex Water also provides Water Treatment Systems for water reuse purposes that can be paired with Fortress Tanks to provide a complete packaged system.