the fuelbox|SKU:FT50-MS-var-57336-305381

Fuelbox 50-Gallon Dual-Mode Diesel Transfer Tank

50-Gallon Dual-Function Diesel Capacity

Dual-mode operation — Auxiliary or transfer tank setup
DOT & EPA compliant — Legal in all 50 states
Marine grade aluminum — .125 thick with reinforced seams
Universal truck fit — Ford, Ram, and GM beds
Pressure tested — Underwater weld quality control
  • Side Bed Step -- Easier bed access included at no extra cost
  • Tool Tray -- Mounted storage for bed hardware and tools

$1,942.50

30-day money back · No restocking fee

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In the box

  • Tool tray
  • Locking Gas Cap
  • Tie down bar
  • Side bed step
The Fuelbox Auxiliary Fuel Transfer Tank
Fuelbox 50-Gallon Dual-Mode Diesel Transfer Tank
$1,942.50

50-Gallon Dual-Function Diesel Capacity

This vetted Fuelbox tank delivers a 50-gallon aluminum diesel reservoir that works as either an auxiliary tank or a transfer tank. Built with .125 marine grade aluminum, reinforced flange seams, and pressure-tested welds, it reflects serious craftsmanship. Every tank ships with a charcoal spray liner inside and out. At $1,943, it's a long-term investment for fleet operations. Ships free with 30-day hassle-free returns. Financing available.

FREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORT
Legal in All 50 States
DOT & EPA Compliant
Marine Grade Aluminum
Pressure Tested Welds
50 Gallon
Total Fuel Capacity
60 in
Overall Length
.125"
Aluminum Thickness
Weld Integrity That Eliminates Compliance Risk

Weld Integrity That Eliminates Compliance Risk

A single weld failure on a fuel tank can trigger EPA fines, cleanup costs, and operational downtime that far exceeds the tank's purchase price. The Fuelbox addresses this with 90-degree flange reinforced seams that double weld joint thickness, creating a structurally superior joint compared to standard single-pass welds. Every tank is pressure tested underwater before leaving the factory, verifying weld integrity under real-world stress. Combined with .125 marine grade aluminum construction and full DOT and EPA compliance, this tank removes the compliance gamble from your fuel storage. It is legal in all 50 states for diesel fuel only.

One Tank, Two Operational Modes

One Tank, Two Operational Modes

The Fuelbox serves as either an auxiliary fuel tank or a transfer tank, depending on your workflow. In auxiliary mode, it connects through an Auto Fuel Controller that plugs directly into your OBD-II port, transferring fuel to your truck as you drive. The Plug and Play controller displays fuel level percentage for both the vehicle tank and the Fuelbox tank. For fleet refueling operations, add the optional 2-inch bung and external transfer pump to dispense fuel to other vehicles and equipment from the same unit. A charcoal spray liner on the interior and exterior provides additional corrosion resistance regardless of which mode you select.

Engineered for Full-Size Truck Beds

Engineered for Full-Size Truck Beds

At 60 inches long by 16 inches wide by 15 inches high, this 50-gallon tank fits Ford, Ram, and GM long bed 8-foot and short bed 6.5-foot configurations. The tapered bottom length of 48 inches allows the tank to seat properly against bed contours without interference. A tie down bar and locking gas cap are included for secure bed mounting and fuel security. The side bed step adds accessibility when accessing the truck bed. Every dimension is designed around standard full-size pickup specifications, so there is no guesswork during installation.

Vehicle Compatibility

The 50-gallon model fits standard truck bed configurations from major domestic manufacturers.

  • Truck bed is 8ft long bed or 6.5ft short bed
  • Vehicle is a Ford, Ram, or GM pickup
  • Truck runs on diesel fuel only

Flexible Fuel Management

Configure this tank to match how your fleet actually works.

Extended Range Auxiliary Feeding
On-Site Equipment Refueling
Remote Job Site Fuel Supply

Full specifications

At a glance

Dimensions
16 inches
Full specifications14 data points across 4 categories

Dimensions

Capacity50 Gallon
Overall Length60 inches
Width16 inches
Height15 inches
Tapered Bottom Length48 inches

Power & Performance

Fuel TypeDiesel fuel only
Controller OptionsPlug & Play (OBD-II) or Digital Display

Materials

Construction.125 marine grade aluminum
InteriorMinimum of two interior baffles
LinerCharcoal spray liner on the inside and outside of the tank
Seam Construction90 degree flange reinforced seems which doubles weld joint thickness for stronger welds

Compliance & Warranty

Legal StatusLegal in all 50 states for diesel fuel only
RegulationsMeets or exceeds all DOT & EPA regulations
Quality ControlPressure tested under water for weld quality control

The Tank Vault Promise

Every product we carry is curated for professionals who need equipment that performs under real conditions.

Vetted for ComplianceThis tank meets or exceeds DOT & EPA regulations and is legal in all 50 states for diesel fuel only.
Ships Free, AlwaysFree shipping on every order with no minimums or conditions. 30-day hassle-free returns included.
Built to LastPressure-tested welds, marine grade aluminum, and reinforced seams ensure commercial-grade durability for daily fleet use.

The Fuelbox Auxiliary Fuel Transfer Tank is a 50 gallon aluminum diesel fuel tank. Choose whether you want to use this fuel tank as a transfer tank or an auxiliary fuel tank. 

*Note: All Fuelbox tanks come standard with the charcoal spray liner on the inside and outside of the tank.

The Fuelbox Auxiliary Fuel Transfer Tank can be used in two ways:

  • As an auxiliary fuel tank for your diesel pickup. Use the Auto Fuel Controller to transfer fuel to your pickup as you drive.
  • Use the optional transfer pump to transfer fuel from the Fuelbox to other vehicles and equipment.  

Available Sizes:

  • 50 gallon: 60 inches long x 16 inches wide x 15 inches high.

*The 50 gallon size has a tapered bottom length of 48 inches.

Vehicle Fit:

  • 50 gallon: Fits Ford, Ram & GM long bed (8ft) & short bed (6.5ft).

FT50-S Auxiliary Fuel Transfer Tank

50 Gallon – A: 15″ B: 16″ C: 60″ D: 48″

Features:

  • Fuel tank is constructed of high quality .125 marine grade aluminum and has a minimum of two interior baffles.
  • Fuel tank has 90 degree flange reinforced seems which doubles weld joint thickness for stronger welds.
  • Pressure tested under water for weld quality control.
  • Compatible with the Auto Fuel Controller systems for use as an auxiliary tank.
  • Add a 2 inch bung for use with an external transfer pump as a transfer tank.
  • Legal in all 50 states for diesel fuel only.
  • Meets or exceeds all DOT & EPA regulations.

Fuel Transfer System

Choose the Auto Fuel Controller or TP13 Transfer Pump or choose both options.

Auto Fuel Controller

Choose the Plug and Play Auto Fuel Controller or the Digital Display Auto Fuel Controller.

The Auto Fuel Controller (AFC) makes the Fuelbox tanks legal in all 50 states for diesel pickups. The AFC system meets or exceeds all DOT & EPA regulations. It also meets the standards required by the VESC-22.

Auto Fuel Controllers (AFC) systems are compatible for all Ford, GM and Dodge diesel pickups. The AFC makes the operation of the auxiliary fuel tanks effortless.

There’s no need to worry about switching between tanks and running out of fuel. Since our system transfers to the stock tank there is NO CUTTING OF FACTORY
FUEL LINES and warranty problems that go along with cutting up OEM lines and you
will always be running off your factory fuel system.

The AFC computer works in conjunction with the Fuelbox by automatically filling your main tank when it gets low as you drive and shuts off when the main tank gets near full. The AFC monitors the stock OEM fuel tank.

When the stock tank gets near 1⁄4 of a tank it will turn on a transfer pump and transfer fuel from the auxiliary tank to the stock tank. The AFC will shut off the transfer pump when the stock tank is near full or the auxiliary tank is empty.

The AFC can be set for automatic operation or it can be manually turned off
from the cab of your truck. In addition there is a manual button, where you can manually transfer fuel for up to 4 minutes.

The Auto Fuel Controller is available in two models: Digital Display Controller or Plug & Play Controller.

  • Plug & Play Controller: plugs directly into your on-board diagnostic (OBD-II) port on your truck. This makes an easier install and avoids the factory wire harness. The plug and play shows the fuel level percentage in both the vehicle tank and the Fuelbox tank.
  • Digital Display Controller: is a vehicle specific controller that is programmed for the year and make of the vehicle. The Digital Display controller only shows the fuel level in the Fuelbox tank.

Transfer Pump

The fuel transfer pump allows you to fill other vehicles and equipment. The transfer pump is a 13 gallon per minute pump with a 12 foot hose and an auto shut-off nozzle. 

Transfer Pump Accessories

  • Filter Kit – Adds filtration to your transfer pump.
  • Fuel Meter – Logs how many gallons you transfer with the transfer pump.

Fuelbox Optional Accessories

  • Tool tray
  • Locking Gas Cap
  • Tie down bar
  • Side bed step

*some accessories are not available for all Fuelbox Combo sizes.

For additional options see:

  • All Fuelbox Tanks.
  • All Auxiliary Fuel Tanks.

    Additional information

    Size

    50 Gallon

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    About the fuelbox Fuel Transfer Tanks

    the fuelbox is a trusted manufacturer of premium fuel transfer tanks. TankVault is an authorized dealer offering the full the fuelbox lineup with free delivery, price match guarantee, and expert support.

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