Permatank Underground Steel Tank

Two underground storage tanks positioned in a trench, surrounded by workers preparing for installation, with a ladder in the background

Permatank® Steel Tanks

Double-Layer Protection

Besides our offering of Aboveground Tanks, One Clarion is excited to offer Permatank® Underground Storage Tanks, which provide cutting-edge solutions for secure and reliable storage. Permatank® tanks feature a unique double-layer design, combining a robust steel inner tank with a durable polyethylene outer layer. This innovative construction delivers superior protection against leaks and environmental contamination, making them ideal for storing fuels, chemicals, and other sensitive materials. For detail benefits of this tank, please visit our Underground Storage Tank page.

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


Permatank® Underground Tank Details

Permatank® tanks are engineered for long-term performance and safety, offering enhanced resistance to corrosion and impact. Their versatile design allows for easy installation and maintenance, accommodating various site conditions and customer requirements. With Permatank® tanks, you can trust in the security and durability of your underground storage solutions, ensuring peace of mind and operational efficiency for years to come. Explore our range of Permatank® products to find the perfect fit for your storage needs. If you're looking for an aboveground storage solutions for your need, please refer to our Aboveground Tanks page.

A close-up of a large, red Permatank® tank resting on a gravel surface, ready for installation

The PERMATANK® double-wall jacketed underground storage tank features a robust inner steel tank paired with an exterior corrosion-resistant fiberglass shell. This design provides dual-layer protection, significantly enhancing durability and safety. A distinctive standoff material is positioned between the inner and outer tanks, creating a uniform interstitial space that ensures rapid and accurate leak detection.

This innovative separation material not only facilitates immediate identification of leaks but also adds an extra layer of security, preventing potential environmental contamination. The advanced construction of PERMATANK® tanks ensures reliable and long-term performance, making them an excellent choice for a variety of storage needs, including fuels, chemicals, and other sensitive materials.

We are also offer the ACT-100® tank underground steel storage tank. Please visit our Act100 Underground Storage Tank page for more detail.

Two large underground storage tanks being installed in a trench, with workers and a ladder visible in the background

Permatank® Underground Tank Features

  • Meets UL 58, UL 1746, and ULC-S603.1 standards for flammable and combustible liquid storage
  • Manufactured and listed in accordance with Underwriters Laboratories standards for steel underground storage tanks and external corrosion protection systems
  • Proven tight throughout installation by interstitial vacuum test with a minimum of 13 inches Hg
  • Provides multiple options to meet EPA leak detection requirements for interstitial monitoring, including the Permatank Precision Vacuum Monitor
  • Steel construction is compatible with all blends of ethanol and biodiesel fuels
  • Impermeable to all petroleum products and vapors
  • The steel inner tank provides structural strength, while the fiberglass reinforced plastic exterior prevents corrosion
  • Designed shorter than an all-FRP tank of the same capacity, reducing installation costs and increasing site layout flexibility
  • Capacities range up to 30,000 gallons
  • Features double-wall construction for added durability and leak detection.

To discover the full range of benefits this tank offers, please check out our Underground Storage Tank page.

Product Specifications

Capacity (Gal) Inner Tank Dimensions (Inches) Approx. Weight (lbs) Download Drawings
4000 64 x 288 3966 Drawing
4000 96 x 132 4525 Drawing
6000 96 x 192 5994 Drawing
8000 96 x 256 7720 Drawing
10000 96 x 324 9324 Drawing
12000 96 x 384 10850 Drawing
15000 120 x 312 12500 Drawing
20000 120 x 408 17400 Drawing
25000 126 x 465 23000 Drawing

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

Some Key Applications for Permatank® Tank

  • Fuel Storage - Ideal for safely storing various types of fuels, including gasoline, diesel, and other petroleum products. The double-wall construction and corrosion-resistant materials ensure secure containment and prevent environmental contamination, making them a preferred choice for gas stations and fuel distribution centers.
  • Chemical Storage - Highly suitable for the storage of industrial chemicals. The impermeable steel and fiberglass-reinforced plastic exterior provide robust protection against leaks and corrosion, ensuring that hazardous chemicals are stored safely and comply with environmental regulations.
  • Emergency Backup Storage - Excellent for emergency and backup fuel storage. Their durable construction and advanced leak detection systems make them reliable in critical situations where an uninterrupted fuel supply is essential, such as in hospitals, data centers, and emergency response facilities.
  • Agricultural Storage - Used for storing fertilizers, pesticides, and other agricultural chemicals. Their strong, corrosion-resistant design ensures that these substances are kept securely, protecting both the environment and the integrity of the stored materials.
  • Commercial and Industrial Use - Permatank® tanks provide versatile storage solutions for a variety of liquids. Their flexible installation options and large capacity make them suitable for businesses needing efficient and secure storage for production processes or large-scale operations.
  • Water Treatment Facilities - Can also be utilized in water treatment facilities for storing treatment chemicals and other essential liquids. Their reliable construction ensures that the storage remains secure and contamination-free, maintaining the quality of the water treatment process.
A large tank being installed underground with workers nearby, surrounded by excavated earth and a vertical pipe protruding from the ground
A worker using a front-end loader to lift a large tank from a trailer at a construction site, with another worker overseeing the operation

These diverse applications highlight the adaptability and reliability of Permatank® underground storage tanks across various industries and uses.

For maintenance and care tips, we also provide comprehensive guidance to ensure the longevity and optimal performance of your Permatank® tanks. Please check them out on our Underground Storage Tank page for detailed information.

If you're looking for an aboveground storage solutions for your need, please refer to our Aboveground Tanks page.

Looking for fuel 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.