ATI 41 Gallon Rectangle Gasoline Auxiliary Fuel Tank
Model: ATI-AUX41RG

The ATI 41 Gallon Rectangle Gasoline Auxiliary Fuel Tank is a necessity for serious truck owners. Our aluminum auxiliary fuel tanks for gas are built to meet and exceed Title 49 CFR 393.65 for fuel tanks. The all aluminum .125" thick HD fuel tank was specifically designed for gasoline. All standard gas models come with the following features:

• Vent fitting with rollover protection
• Fuel pickup fitting
• Fuel return fitting
• Automotive style fuel filler cap
• 3/8" npt drain fitting
• Fully welded baffles to reduce content movement
• Visual, pressure and video leak detection test
• Tanks cleaned inside and out prior to shipping
• Mounting Tabs
• 1 Year limited warranty
• NOTE: The back side of this tank is made with smooth aluminum and is not diamond plated

The rectangle aluminum Auxiliary Tank is the most popular in the lineup. Our standard gas auxiliary fuel tanks range from 30 to 65 gallons. If you want to keep most of your bed space check out our more slender aluminium fuel tank designs. We also have a lay down style that fits under most crossover toolboxes.

Be sure to add the optional tank mounted fuel gauge or cabin mounted fuel gauge to keep track of your fuel levels!

The gasoline auxiliary tank connects into the factory fuel system through the filler neck hose (optional 1 inch filler neck adapter available). The gasoline auxiliary tanks install very similar to the diesel ones, however it is not legal to gravity feed out of the bottom of the auxiliary tank with gasoline. By law, the fuel must be pulled from a fitting on TOP of the auxiliary tank. We add a pickup tube to the gas auxiliary tanks with a hose barb on the top of the tank. You must use an inline fuel pump (We recommend the Carter Universal Rotary Vane Electric Fuel Pump P4070) with a switch in cab to pull the fuel from the top of the aux tank and pump it into the factory tank via the fill neck hose.

We do offer the 1" fill neck adapters (optional) which work with most gas trucks. These adapters have two 3/8" hose barbs; one where your fuel comes in and one where we recommend running a return line back to the auxiliary tank. We also offer a hose and clamp kit (optional) that comes with 8 feet of hose, which should be enough to run from the aux tank to the pump, the pump to the filler neck adapter, and then a return line from the filler neck adapter back to the aux tank.

On some trucks, you may to run another hose from the vent on the aux tank and "T" into the vent line that runs along with the filler neck hose. This will close the system to ensure you don't get check engine or loose gas cap lights. Another option is to simply cap/plug the vent on the tank and the auxiliary tank will vent through the factory tank via the return line.

NOTE: Due to the California Air Resource Board (CARB) regulations, we will NOT offer gasoline auxiliary fuel tanks for sale in the state of California for the purpose of connecting to the vehicles factory fuel system. Our diesel auxiliary tanks and all refueling tanks for gas or diesel WILL remain available for sale in the state of California.

Please be aware that tanks/toolboxes may have mounting tabs that extend the dimensions of the tank by 1 1/2 inches on each side. This is NOT accounted for when viewing the displayed dimensions of the tanks/toolboxes. In addition, the fuel cap adds an additional 2 1/2 inches to the total height of the tank. Please be sure to account for this when measuring for fitment of your tank/toolbox.

Detailed Information


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