Bulk Holding Tanks

Dura-Tech fiberglass bulk holding tanks are built for industrial facilities that need large-capacity storage with durable, corrosion-resistant performance. These tanks are a practical choice for process water, chemical storage, treatment systems, industrial containment, and other applications where a strong, versatile tank is required.

Dura-Tech developed its bulk holding tank line in response to the need for sturdy, readily available tanks with faster fabrication times. One of the key differences between these tanks and Dura-Tech’s standard vertical tanks is the visible out-turned bolted seam, which helps support faster assembly. On the interior, the seam is hand laid with layers of fiberglass to create a complete sealed internal surface.

Built with premium resin and fiberglass reinforcement, Dura-Tech bulk holding tanks are rust-proof, lightweight, durable, and well suited to demanding industrial environments. High-performance resins and gelcoats are available for specialty applications where corrosion resistance, heat resistance, insulation, or specific storage conditions are required.

Bulk holding tanks can be built to ASTM 4097-01 standards and configured around your storage requirements, site conditions, operating temperatures, access needs, and installation layout. Dura-Tech can also support delivery and installation, and tanks can be tested before and after installation to help ensure they are ready for service.

Best for:

  • Large-capacity industrial storage
  • Process water storage
  • Water treatment systems
  • Above-ground liquid storage
  • Facilities requiring faster tank fabrication
  • Projects requiring durable, corrosion-resistant FRP tanks

Standard size options:

  • 5′ diameter models
  • 6′ diameter models
  • 8′ diameter models
  • 10′ diameter models
  • 11′ diameter models
  • 12′ diameter models
  • 16′ diameter models
  • 23′ diameter models
  • Capacities from approximately 273 to 41,088 US gallons
  • Multiple heights available depending on required volume

Why fiberglass bulk holding tanks?

Fiberglass is an effective material for bulk holding tanks because it is rust-proof, lightweight, and resistant to corrosion. For industrial facilities, this can reduce maintenance requirements and help extend service life compared to materials that may corrode, require liners, or need more frequent repair.

Bulk holding tanks are designed for larger storage requirements where volume, access, reliability, and fabrication time matter. Dura-Tech’s bolted seam design supports faster fabrication, while the sealed hand-laid interior seam helps protect the tank’s internal surface for storage and process applications.

For applications involving heat, chemicals, outdoor exposure, or specific operating conditions, Dura-Tech can work with your team to select resin, gelcoat, insulation, fittings, and accessories that suit the project.


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