Nothing really, but the hookup is the difference depending on the outlet placement, Aux is generally gravity fed, whereas a transfer tank usually has a pump and some even a valve and onto having a remote fuel guage and auto shutoff.
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RDS Aluminum Auxiliary Fuel Tank Toolbox Combo, 40-Gallon, Rectangular, Diamond Plate, Model# 72775

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Shipping:
Free shipping (lower 48 states) - Factory shippedHeavy/large item. Lift gate service available.
Store Pickup:
Not available - online only
- Aluminum Tank and Toolbox - NO RUSTING
- Heavy-duty 0.125 ga. aluminum used for tank
- Toolbox built using 0.058 ga. aluminum
- Toolboxes come with stainless steel locks that also secure fuel fill to prevent tampering, plus two cylinders to hold open crowned lid
- Fully welded seams
See full description
Description
Key Specs
Reviews
Q & A
Accessories
Warranty
Compare
Product Summary
What's Included
- (1) Fuel tank tool box combo
Downloads
Features + Benefits
- Aluminum Tank and Toolbox - NO RUSTING
- Heavy-duty 0.125 ga. aluminum used for tank
- Toolbox built using 0.058 ga. aluminum
- Toolboxes come with stainless steel locks that also secure fuel fill to prevent tampering, plus two cylinders to hold open crowned lid
- Fully welded seams
- Reinforced lid
- 100% pressure tested and submerged to test for leaks
- Aluminum mounting brackets
- DOT Apporved Tank for diesel fuel
- Diesel install kits (Item#s 3490901, 3490902 and 43748), are also available (sold separately) to gravity feed diesel fuel
- Increases driving range
- Includes 3/8in. ftp drain plug
- Cannot be used to transfer gasoline to another vehicle
- Built-in tank baffles to reduce sloshing
- Manual fuel sight gauge
- Enclosed fuel fill area for added protection
Key Specs
| Attribute | Specification |
|---|---|
item# | 349098 |
Brand | RDS |
Manufacturer's Warranty | 12 months parts/12months labor |
Ship Weight | 143.0 LB |
Capacity | 40 Gal |
Shape | Rectangle |
Material | Aluminum |
| Attribute | Specification |
|---|---|
Finish | Diamond Plate |
Inlet Port | 2 in |
Outlet Port | 2 in |
Mounting Hardware Included | Yes |
DOT Approved | Yes |
Product Weight | 90 lb |
Reviews
Questions & Answers
Questions
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· 16 years ago
What is the diference aux and/or transfer tanks
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Handoff57· 10 years ago
Helpful?
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rsg1963· 15 years ago
Trans tanks are used to refill equipment at jobs sites, etc. and have permanant pumps attached to them. Aux tanks are simply additional storage for the vehicle carrying the fuel. Think of the Aux units as driving range extenders.
Helpful?
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ProductExpert5· 16 years ago
Auxiliary tanks can be connected directly to a vehicles fuel line. Transfer tanks would need to have a fuel transfer pump to either fill the vehicle or other fuel tanks.
Helpful?
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· 10 years ago
Gasoline VS Diesel
Why can this not be used with gasoline? Is there a similar product that can be used with gasoline?
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ProductExpert29· 3 years ago
There are regulations set by the DOT restricting this tank from use with gasoline due to safety concerns. Please see our item #98679 for a slightly larger tank that can be used with gasoline and has a transfer pump included.
Helpful?
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ProductExpert40· 10 years ago
There are regulations set by the DOT restricting this tank from use with gasoline due to safety concerns. Northern does carry a similar item which can be used with gasoline but it is a little bigger with a 60 gallon capacity. See item below.
Helpful?
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· 13 years ago
Does the fill rite 13 GPM model sd 1202G fit in the pump compartment
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ProductExpert29· 3 years ago
This auxiliary tank cannot be used as a transfer tank and does not have the proper fitting to add a pump.
Helpful?
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ProductExpert31· 13 years ago
No, this is not a auxiliary tank.
Helpful?
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· 13 years ago
Is this an auxillary tank or a transfer tank? How does a gravity fill work?
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ProductExpert29· 3 years ago
This tool box tank combo is an auxiliary tank only. This tank can gravity feed diesel fuel into the fuel tank in your truck with an auxiliary conversion kit, item #3490901, #3490902, or #43748. As the main tank uses fuel, it is replaced from the auxiliary tank.
Helpful?
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ProductExpert40· 13 years ago
This tool box tank combo is an auxiliary tank only. Gravity feed goes directly into the trucks main fuel tank with our diesel install kits, items number 3490901, 3490902. As the main tank uses fuel, it is replaced from the auxiliary tank.
Helpful?
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· 3 years ago
Can the fuel supply the main tank be left in the on position permanently?
1 answer-
ProductExpert6· 3 years ago
The main tank can be left on. When the auxiliary tank is used with the proper auxiliary install kit, the kit will have a ball valve that keeps the auxiliary tank from over filling the main tank.
Helpful?
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· 10 years ago
My truck has a topper. Can I fill this tank with the topper in place?
1 answer-
ProductExpert41· 10 years ago
This tank was not designed to be used in conjunction with a topper; so it is not possible to fill the tank with at topper in place.
Helpful?
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· 11 years ago
Do you need space at the back of the tank for the lid to open?
If the tank sit flush up against a wall will the lid open, or do you need some space
1 answer-
ProductExpert30· 11 years ago
This fuel tank toolbox combo will require at least 1" clearance away from the wall to open the lid.
Helpful?
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· 11 years ago
Can this tank be filled with the larger diameter nozzles found in truck lanes?
1 answer-
ProductExpert13· 11 years ago
This tank can be filled using the larger diameter nozzles.
Helpful?
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· 11 years ago
Is the tank baffled to reduce fuel sloshing?
1 answer-
ProductExpert30· 11 years ago
This RDS tank is baffled.
Helpful?
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· 12 years ago
Auto fill kit fit a 1997 ford 3/4 ton ext cab
1 answer-
ProductExpert29· 3 years ago
Please see our item #3490901 for an auxiliary conversion kit that works with Ford trucks that have a 1-1/2" diameter fill line.
Helpful?
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Warranty
Manufacturer's Warranty
12 months parts/12months labor
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Specifications
40 Gal
95 Gal
47 Gal
51 Gal
Rectangle
L-Shaped
L-Shaped
Rectangle
Aluminum
Aluminum
Aluminum
Aluminum
Diamond Plate
Diamond Plate
Diamond Plate
Diamond Plate
2 in
2 in
2 in
2 in
2 in
2 in
2 in
-
Yes
No
No
No
Yes
Yes
Yes
Yes
90 lb
104
63 lb
66 lb
-
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AV Gas, Kerosene, Methanol and Ethanol
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