Diesel Exhaust Fluid (DEF) Tanks
Meeting DEF Requirements for Secure Storage
Since diesel exhaust fluid (DEF) can’t be exposed to carbon steel, fiberglass is the ideal tank material for DEF storage. Unlike tanks made of other materials, a fiberglass tank does not require added corrosion protection, special equipment or costly maintenance. One of the advantages of underground storage of DEF is its storage temperature requirements. Adding Xerxes’ Truchek® hydrostatic monitoring provides the added security of continual monitoring and tank-testing capability.
Tank materials and geometry create structural strength
- Premium resin and glass-fiber reinforcement provide internal and external corrosion resistance
- Cylindrical tank with rounded end caps is designed to withstand the stresses of underground storage.
- Integrally manufactured fiberglass ribs function like I-beams that enhance tank strength.
- Our patented 3D Parabeam® glass fabric bonds tank walls together for added strength.
- Tank is designed to withstand H-20/HS-20 axle loads.
Xerxes tanks meet – or exceed – industry standards
- Meets PEI/RP1100 requirements
- Meets ISO 222241 requirements
- Specifically tested for storage of urea DEF (AUS32) – both tank and accessory materials
- Can be manufactured as an ANSI/CAN/UL/ULC 1316:2018-listed tank
Why choose a Xerxes DEF tank?
- Tank and accessory materials are backed by extensive third-party testing for urea DEF (AUS32)
- No special coatings or linings are needed to protect product integrity
- Tank is factory-cleaned with deionized or distilled water before shipping
- Corrosion-resistant fittings are sealed to prevent contamination
DEF Tanks Success Stories
Fuel Retailer - Texas, US
Shipping a tank ready to store DEF is a natural solution for major retailer
When a major fuel provider was looking for a DEF tank for a distributor, the clear choice for the Texas travel plaza project was a Xerxes fiberglass tank. The fuel retailer wanted to work with a company that had proven technical knowledge in fuel-product storage options. With East Texas temperature fluctuations, avoiding aboveground storage was a plus because DEF freezes when it’s stored below 12° F. Complicating things, when stored at temperatures above 77° F. for extended periods, DEF’s shelf life can be significantly reduced. Our DEF tanks don’t require special equipment or maintenance to maintain optimal temperatures for the product. Another plus is that our tanks can be repurposed for other fuels in the future. That all provides valuable long-term flexibility to a tank investment.
University Campus - Alabama, US
Replacing vehicle fleets often call for upgrading fuel storage
When a university in Alabama was replacing its old fleet with new buses that have SCR (selective catalytic reduction) technology, they also needed to build a new bus facility and replace their aboveground fuel tank with underground tanks to store both diesel and diesel exhaust fluid (DEF). The engineering group designing the new facility saw only one option for the tanks: Xerxes double-wall tanks. Today, the 20,000-gallon diesel tank and the 8,000-gallon DEF tank service not only the new facility, but other service vehicles on campus, too.

