From in-stock 40,000-gallon underground fuel tanks to custom-engineered 75,000-gallon aboveground systems — Stealth Tanks supplies certified storage solutions across seven product categories. If you need to store a liquid safely and compliantly, we have the product.
Every product category below is sourced from our manufacturer partners, certified to applicable UL, API, and ASTM standards, and available for delivery across the continental US.
Double-wall steel underground storage tanks for fuel retail, fleet, and industrial applications. UL 58 primary steel with UL 1746 HDPE secondary jacket. Triple-compartment configurations for multi-product dispensing.
Steel aboveground storage tanks for fuel, lubricants, and chemicals at fuel retail sites, fleet yards, farms, and industrial facilities. Available with secondary containment, heating coils, and custom inlet/outlet configurations.
Steel and high-density polyethylene (HDPE) water storage tanks for potable water supply, fire suppression reserves, agricultural irrigation, and industrial process water. Potable water variants are NSF/ANSI 61 certified.
Underground and aboveground aviation fuel storage systems for FBOs, regional airports, and private airfields. Jet-A, Avgas 100LL, and ground support diesel configurations with spill containment and overfill protection standard.
On-farm fuel, liquid fertilizer, and agricultural chemical storage tanks. Polyethylene and steel options matched to your specific product. Farm-spec pumping systems, bund containment, and vent configurations included.
Dedicated Diesel Exhaust Fluid (DEF) storage tanks for truck stops, fleet yards, and distribution terminals. Built with DEF-compatible materials that protect the fluid from contamination and keep your SCR-equipped diesel fleet compliant. Stock sizes plus custom builds to spec.
Custom-compartmented tanks, skid-mounted systems, multi-product configurations, and specialty containment for unique applications. We work with our manufacturer to engineer tanks that don't fit a standard catalog — and we hold the certifications to back them up.
Our in-stock double-wall underground storage tanks are manufactured by a 75-year-certified steel tank producer and carry full UL listing (UL 58 / UL 1746). Every tank ships with full certification documentation.
| Specification | 32,000 Gallon | 40,000 Gallon |
|---|---|---|
| Total Capacity | 32,000 gal | 40,000 gal |
| Compartments | 6K / 20K / 6K | 6K / 28K / 6K |
| Inner Tank | UL 58 steel (primary) | |
| Outer Jacket | UL 1746 HDPE (secondary) | |
| Wall Design | Double-wall | |
| UL Listing | UL 58 / UL 1746 | |
| Compatible fuels | Gasoline, diesel, E85, Avgas | |
| Installation | Underground | |
| Lead time | Ships in days (in-stock) | |
Aboveground tanks are the right choice when underground installation isn't feasible or when your regulatory environment allows easier inspection and access. We offer UL 142 shop-built tanks and API 650 field-erected tanks for high-volume applications.
Certifications on a tank aren't marketing — they're the proof that a tank has been manufactured and tested to a specific standard. Every regulator, insurer, and engineer asks for them. Here's what we carry and what each one means for your project.
UL 58 is the Underwriters Laboratories standard for steel underground tanks for flammable and combustible liquids. Every state environmental regulator and fire code references it. Without UL 58, a UST cannot be legally installed.
The secondary HDPE jacket on our double-wall tanks is certified to UL 1746 — the standard for external corrosion protection systems for steel USTs. It's what makes the tank corrosion-resistant and what satisfies EPA 40 CFR Part 280 requirements for secondary containment.
API Spec Q1, 9th Edition is the quality management system standard for the oil and gas industry. Our manufacturer holds this certification — it means their design, manufacture, and delivery processes meet the most rigorous quality requirements in the petroleum sector.
API 650 is the standard for shop-built welded steel storage tanks. License #650-0032 allows our manufacturer to produce large-volume aboveground tanks to this standard — required for industrial, refinery, and bulk storage applications over 10,000 gallons.
ISO 9001:2015 certification means the manufacturing facility operates a documented quality management system — from raw material incoming inspection through final delivery. Valid through 2028. It's the internationally recognized proof that production processes are controlled.
UL 142 is the Underwriters Laboratories standard for steel aboveground tanks for flammable and combustible liquids. It's the AST equivalent of UL 58 — required by most fire codes and insurance carriers for aboveground fuel storage applications.
We always give honest lead times upfront. The biggest advantage we have — and the one that keeps clients coming back — is that our most common sizes are already built.
| Product | Size Range | Standard Lead Time | Notes |
|---|---|---|---|
| 32,000 Gal. Double-Wall UST | 32,000 gal | 3–7 business days ✓ | In stock, Greater Houston |
| 40,000 Gal. Double-Wall UST | 40,000 gal | 3–7 business days ✓ | In stock, Greater Houston |
| Custom UST (non-stock size) | 10K – 75K gal | 6 weeks | Manufacturer build-to-order |
| UL 142 Aboveground Tank | 500 – 50K gal | 2–8 weeks | Size and option dependent |
| UL 2085 Fire-Protected AST | 500 – 12K gal | 4–8 weeks | Insulated double-wall |
| API 650 Large-Volume Tank | 10K – 75K+ gal | 8–20 weeks | Custom-engineered |
| Water Storage (Steel/Poly) | 500 – 500K gal | 2–16 weeks | Varies by size/material |
| Skid-Mounted Fuel System | 500 – 5K gal | 3–6 weeks | Pre-assembled with pump |
We work with multiple manufacturers and can source specialty configurations not shown in this catalog. Tell us your product, volume, site, and regulatory environment — we'll find a compliant solution and quote it straight.