Underground Steel Tanks

Two large underground storage tanks installed in a trench, secured with straps and surrounded by construction materials at a building site

Underground Steel Storage

Act100® & Permatank® Underground Storage Solutions

At Water-Storage-Tank.com, we proudly offer high-quality underground steel storage tanks, including the innovative Act100® and Permatank® tanks. These tanks are designed to provide robust, reliable solutions for a variety of storage needs. For an aboveground storage solutions, please refer to our Aboveground Tanks page.

Looking for underground storage solutions? We can help! Call us at 1-863-270-8118 or contact us to discuss your needs.


Act100® Tanks & Permatank® Tanks Details

The Act100® Tanks feature advanced double-wall construction and corrosion-resistant materials, ensuring long-lasting durability and safety. Meanwhile, the Permatank® combines the structural strength of steel with the protective benefits of polyethylene, delivering unparalleled performance in fuel and specialty storage applications. Whether you need a solution for fuel storage, lube oil storage, or other specialized uses, our range of underground storage tanks offers the perfect balance of strength, durability, and reliability. Explore our selection below to find the ideal tank for your specific requirements.

A large, empty underground storage tank resting on a gravel surface, ready for installation

Act100® Tanks leverage a composite design that integrates steel with an external fiberglass coating, providing excellent corrosion resistance and environmental protection. These tanks are engineered for environmental safety and durability, featuring advanced leak detection systems. Permatank® Tanks combine a steel inner tank with a polyethylene outer layer, offering double protection against leaks and contamination. This dual-layer structure is ideal for storing aggressive chemicals and fuels. Both tank types include easy installation features and customizable options, making them suitable for a wide range of industrial storage needs.

Looking for underground storage solutions? We can help! Call us at 1-863-270-8118 or contact us to discuss your needs.

Act100® Tanks

Act100® Tanks represent a pinnacle of innovation in underground storage solutions. Built with a double-wall design, these tanks offer exceptional protection against environmental elements and potential leaks. The outer wall features a corrosion-resistant coating, enhancing the tank's lifespan and ensuring reliable performance. Designed to meet rigorous industry standards, Act100® Tanks are suitable for a wide range of applications, including fuel and lube oil storage. Their robust construction and advanced materials make them a dependable choice for secure and long-lasting underground storage.

Act100® Tanks Benefits:

  • Made from steel, these tanks support recycling efforts
  • Low-cost compartments and customization options available
  • Built to nationally recognized STI standards with a stringent third-party quality control inspection program
  • Backed by a 10-year warranty against internal and external corrosion
  • A 30-year warranty option is available
A crane lifting an Act100® tank off a truck for installation at a construction site

Maintenance and Care Tips for Act100® Tanks

  • Regular Inspections: Conduct routine inspections to check for any signs of corrosion or damage. Ensure that the external fiberglass coating remains intact to prevent any exposure to environmental elements.
  • Leak Detection: Utilize the advanced leak detection systems built into Act100® Tanks. Regularly monitor these systems and address any alerts promptly to prevent environmental contamination.
  • Cleaning and Debris Removal: Keep the tank and its surrounding area clean and free of debris. Periodically clean the tank exterior and ensure the vents are unobstructed.
  • Environmental Monitoring: Monitor the surrounding environment for any changes that could impact the tank's integrity. Check for groundwater or soil shifts that might affect the tank's placement.

Permatank® Tanks

Permatank® Tanks are designed with a unique interstitial space between the steel inner tank and the polyethylene outer layer, allowing for continuous monitoring to ensure maximum safety. This feature provides an additional safeguard against leaks and environmental contamination. The tanks also come with built-in grounding connections to prevent static electricity build-up, enhancing safety during fuel transfer operations. Additionally, Permatank® Tanks are available in various sizes and configurations, catering to diverse storage requirements, and are engineered for easy maintenance, ensuring long-term operational efficiency.

Permatank® Benefits:

  • Crafted from steel, these tanks support recycling initiatives
  • Various back-fill options provide opportunities for money-saving installations
  • Low-cost compartments and customization options are available to meet specific storage needs
  • Built to nationally recognized STI standards, each tank undergoes a rigorous third-party quality control inspection program to ensure high quality and reliability
one underground storage tanks positioned in a trench, with workers preparing for installation

Maintenance and Care Tips for Permatank® Tanks

  • Dual-Layer Integrity: Regularly inspect both the steel inner tank and the polyethylene outer layer for any signs of wear or damage. The dual-layer structure provides added protection, but both layers must be maintained.
  • Interstitial Space Monitoring: Check the interstitial space between the inner and outer layers frequently. This space is crucial for detecting leaks and preventing contamination.
  • Grounding Connections: Ensure that the built-in grounding connections are intact and functioning correctly. This prevents static electricity buildup, especially important during fuel transfers.
  • Warranty and Professional Inspections: Take advantage of the provided warranties by scheduling professional inspections. This ensures that any potential issues are caught early and maintains the validity of the warranty.
  • Routine Cleaning: Maintain cleanliness around the tank installation site. Clear any debris or obstructions to ensure proper ventilation and access for maintenance.

These maintenance and care tips will help ensure the long-term reliability and safety of your Act100® and Permatank® tanks. Regular attention and professional oversight can significantly extend the lifespan of these storage solutions. If you're looking for an aboveground storage solutions for your need, please refer to our Aboveground Tanks page.

Looking for underground storage solutions? We can help! Call us at 1-863-270-8118 or contact us to discuss your needs.


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For immediate assistance, call: 863-270-8118 during business hours are Monday to Friday, from 8am to 8pm (Eastern Time). Rest assured that a knowledgeable and friendly team member will respond to your inquiry as quickly as possible within these hours. 

At WATER-STORAGE-TANK.COM, we specialize in providing high-quality water storage solutions for a wide range of applications. From residential and agricultural needs to commercial and industrial projects, we offer an extensive selection of water tanks, trailers, and accessories to meet your specific requirements. Our mission is to deliver durable and reliable products that are built to last while offering exceptional customer service and expert support. Whether you need a single tank or a complete system, Water-Storage-Tank.com is your trusted partner for all your water storage needs.