RDS Auxiliary Fuel Tank — 32-Gallon Capacity, Model# 71804

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RDS Auxiliary Fuel Tank — 32-Gallon Capacity, Model# 71804

Item# 3490044

Only $429.99

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Factory Shipped —
Delivery Time: 9 - 14 Business Days

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Ships Truck (60.0 lbs)
Special unloading requirements

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Product Details

This tank offers extra fuel capacity for a boat, generator, or other specialty application using diesel fuel. U.S.A.

It is the user’s responsibility to comply with local, state and federal requirements pertaining to safe transportation, loading and discharging of tank contents.

Features + Benefits

Aluminum Tank - NO RUSTING
Heavy-duty 0.125 ga. aluminum used for tank
Fully welded seams for durability
100% pressure tested and submerged to test for leaks
Includes heavy-duty 0.187 ga. aluminum mounting brackets
Tank can be used to transport diesel, water, fertilizer, gasoline, oil, and bio fuel
Cannot be used to transfer gasoline to another vehicle
Tank includes a vented fill cap and dual withdrawal tubes (2nd tube can be used for diesel applications as fuel return)
Diesel install kits (Item#s 3490901 and 3490902), are also available (sold separately)

Key Specs

Item#	3490044
Ship Weight	60.0 lbs
Tank Type	Auxiliary
Mounting Type	Truck bed
Compatible With	Diesel
Tank Size (gal.)	32
Works With	Fits 5, 6, 8 foot truck beds
Shape	Rectangle
Overall Dimensions L x W x H (in.)	50 x 20 x 9
Outlet Diameter (in.)	3/8
Inlet Diameter (in.)	2
Material Type	Aluminum
Finish Type	Diamond plate
Mounting Hardware Included	Yes, mounting tabs
DOT Approved	Yes
Includes	Vented fill cap and dual withdrawal tubes

What's Included

(1) Fuel tank

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Manufacturer Warranty

12 months parts / 12 months labor

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Have A Question About This Product?

9 Questions | 10 Answers

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9 Questions : 10 Answers

Product Q&A

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1 answer

Gasoline????

Details:

Why can't gasoline be put on this tank?

Anonymous

July 15, 2012

Answers

This tank comes with a label that they are for diesel only. If you are going to use gasoline in them and want to have a label to replace the diesel fuel only you will need to contact the manufacturer and request a gas only label. Auxiliary tanks are designed for either diesel or gas (gas cant be use in California). You will need to check with your local DOT for hook up. Gas can be used in the auxiliary tank, it cannot be used to transfer or gravity feed.

ProductExpert5

(read all my Q&A)

July 16, 2012

2 answers

Im told that this item does work with Gasoline, pending state regs?

Details:

If so, how is it fed to the main gas tank?

maxxp

(read all my Q&A)

October 29, 2010

Answers

This tank is not intended to be used with gasoline.

ProductExpert27

(read all my Q&A)

October 30, 2010

Yes when you decide too.or just leave the valve open and it keeps draining into your main tank.

71804

- Georgia

(read all my Q&A)

November 16, 2010

1 answer

37 gallon tank 71804

Details:

Hi can you tell me how much the fuel gauge is for this tank, THANKS Harland.

harzy

- Pinconning Michigan 48650

(read all my Q&A)

January 16, 2011

Answers

At this time we do not offer a fuel gauge for this RDS-37 gallon fuel tank.

ProductExpert11

(read all my Q&A)

January 18, 2011

1 answer

What gauge is the aluminum?

Desinger

- Seattle

(read all my Q&A)

February 14, 2011

Answers

The gauge of the aluminum is .125 thickness.

ProductExpert10

(read all my Q&A)

February 14, 2011

1 answer

DOT certification

Details:

Is this tank DOT certified for bed-mounting?

Anonymous

April 6, 2011

Answers

DOT certification is based on your local codes with this tank.

ProductExpert10

(read all my Q&A)

April 7, 2011

1 answer

What is the process for installation?

jeshliman409

- Texas

(read all my Q&A)

April 27, 2011

Answers

You would bolt the tank into the back of your truck. You will need to purchase an install kit also that will carry the fuel from the auxiliary tank to your gas tank. The kits are #3490901 and 3490902, depending on what vehicle you have. The installation instructions of the install kits can be found at www.gravityfeed.4t.com.

Products from my answer

RDS Diesel Install Kit for Auxiliary Diesel Fuel Tank - Fits Chevy/GMC Trucks 1999 - 2010, Model# 011029

(41)

RDS Diesel Install Kit for Auxiliary Diesel Fuel Tank - Fits 1999-Current Ford and Dodge, and 2011-Current Chevrolet and GMC Trucks, Model# 011025

(47)

ProductExpert6

(read all my Q&A)

April 28, 2011

1 answer

does this tank have baffles inside? can i switch out a 0-90ohm sender for the fuel level gauge that is in it now?

dieselcowboy

- utah

(read all my Q&A)

June 1, 2011

Answers

The tank does have baffles inside. If the sender has the same standard 5 bolt mounting pattern, you will be able to replace the fuel level gauge with the 0-90 ohm sender.

ProductExpert12

(read all my Q&A)

June 7, 2011

1 answer

Is there a locking filler cap available for this item?

Chog

(read all my Q&A)

April 19, 2012

Answers

There currently is not a locking filler cap available for this auxiliary fuel tank.

ProductExpert40

(read all my Q&A)

April 20, 2012

1 answer

Can I put a toolbox over the top of this tank ? Can you reccomend a model of toolbox?

Bits

- Peoria AZ

(read all my Q&A)

May 9, 2013

Answers

A toolbox can safely be placed over this tank however by doing so you are going to cover up the fuel gauge. At Northern we do not sell any toolboxes that fit over it but I will list a toolbox/fuel tank combo below.

Products from my answer

RDS Fuel Tank Toolbox Combo - 48-Gallon Capacity, Model# 72774

ProductExpert41

(read all my Q&A)

May 10, 2013

RDS Auxiliary Fuel Tank - 32-Gallon Capacity, Model# 71804 4.6 5 22 22

auxiliary tank RDS tanks are very good value and their customer service is excellent. An easy install. August 20, 2012

Aux fuel tank Easy to install. Product was as described. Placed shallow tool box above tank. Cut hole in bottom of tool box for fuel gage and vent fittings. Looks and works like an combo tank/tool box, but much cheaper if you already have the tool box. Can't get full 37 gals in tank, but close. August 13, 2012

SIMPLE AND EASY INSTALLATION Purchased for my 2007 Dodge 3500 - surprised at how easy it was to install. Removed 1 1/2" from the hose and installed kit with valve horizontally. Fuel fills the fuel tube and then shuts off with no spillage. Don't forget to add extra fuel hose to the vent for easy flow . August 26, 2011

Great Tank Tank works great, and installs very easy. Had it going in about an hour November 16, 2010

Auxiliary Fuel Tank for my RV I installed this tank in my truck that I pull my fifth wheel RV with. With an additional 36 feet tagging along you have to be more selective on fuel fill ups (clearance and maneuverability). Now with an additional 37 gallons at 11mpg I don't have to stop when my main tank registers empty. I do wish Northern would carry the a 12v – Shut Of Valve. With a flip of a switch the auxiliary tank drains into the main tank and I don't have to leave the cab to make the change. November 16, 2010

Great size, needs better description I bought this for my work truck...2006 GMC shortbed with Duramax. I'm in the same boat as lots of reviewers on here. GM needs a bigger tank! I actually USE my truck not just to drive it to work and the store. I have been looking for a good tank that won't take up a huge amount of space. THIS IS IT! I checked the measurements and saw that it should fit under my cross bed delta tool box. I ordered the tank and install kit which is a bit pricey but well worth it in the long run. I got the tank and the measurements listed didn't add in the hieght of the vents and pick-ups on the top of the tank. With a bit of work and a trip to the hardware store to get the vent shorter by using and elbow I got it to fit under the box and its perfect because it really doesn't take any more floor space I lost with the tool box originally. I wish the tank was availible with black powder coat to match the tool box but a rattle can will fix that. February 7, 2010

37 gallon diesel tank I ordered this diesel tank along with the fill kit for my 2007 Dura Max. I pull a 38' fifth wheel, so I needed to extend my traveling distance between fill ups. This 37 gallons auxillary tank along with my trucks 26 gallon tank gives us all the fuel we need before we want too make a pit stop. This is an excellent buildt low profile tank and it looks great too ! The fuel guage on the tank is an added feature I love, If you watch the guage, you won't spill any fuel. I am sure glad that I didn't go larger because of the added fuel weight. It was very, easy to install, it works great and looks like it belongs in my truck. I recommend this tank ! November 4, 2009

aux diesel tank my son and I installed tank on 2005 Chevy 2500hd Duramax in about 2 hrs. Very easy. Would like electric tranfer switch. November 2, 2009

Fuel tank makes travel a pleasure I have a 2006 short bed Duramax, I don't know why GM put a 25 gal fuel tank in this truck. If the engineers can put that much engine in that small of a space they could have added an extra 9 gallons of fuel like they did in the long bed. 25 gal would be okay if you were just using the truck for normal driving, but when you add a toyhauler your millage drops to about half. When I go camping and leave from phoenix to go to the mountains I would need to fill up before going into the back country to assure that I could get back out to civilization, this always gave me an uneasy feeling. I have a hard tonneau cover so I can't use a tank that goes over the top of the side of the truck, and using a tall tank robs me of usable space. This tank is great I can pull the cover off and park the front end of a quad on the tank, so I don't lose much space. The aux line that feeds into the main filler neck works great. I added a manual valve to that line and keep it shut off until I need fuel when get to where I am going or to about 1/4 tank and I then open the valve up and it starts filling the tank. The only thing that is bad, is the computer on the truck, it does not like the fuel gauge going up, consequently if it gets close to full, the fuel gauge goes to E and gives you yellow light. Just stop the truck and take a break, the computer will reset itself after you restart the truck after a bit. If you leave your valve open it will not over fill the tank if you use the the filler kit they have listed as a option. I don't drive my truck much during the week, so I can pick the time and the place to fill up. Prices, location, and time are at my disposal not when I need them, this saves me money. I just got back from Vegas, I filled up here and still had 3/4 of a tank upon return. I am glad I purchased this tank and would highly recommend it to anyone that pulls a trailer. July 21, 2009

37 gallon fuel tank I purchased this tank and the diesel fuel neck installation kit several years ago, and mounted it in my F350-pickup box. It fits under my roll-n-lock box and makes good use of the space, The fuel guage on the tank is a very handy plus. If I am pulling a heavy trailer, I wait until I am between 3/4 and 1/2 on the main tank and stop for a quick break and open the fuel valve. It then flows into the main tank at a rate that keeps up with the fuel consumption and provides a long day's driving range for me. I love not having to hunt for fuel all the time and filling up one time per day. When solo, the truck can go so far you can choose if and when you ever need to add fuel and hit the low prices identified by internet. July 20, 2009

1-10 of 22

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Hide Similarities

Tank Type	General purpose	General purpose	Auxiliary	Transfer/auxiliary–vertical	Transfer/auxiliary–vertical
Mounting Type	On deck	Portable or permanent	Truck bed	Truck bed	Truck bed
Compatible With	Gas or diesel fuel	Gas or diesel fuel	Diesel	Diesel	Diesel
Tank Size (gal.)	13	18	32	70	90
Works With	Boat, generator, pressure washer	Boat, generator, pressure washer	Fits 5, 6, 8 foot truck beds	Fits 5, 6, 8 foot truck beds	Trucks, agriculture equipment, construction
Shape	Rectangle	Rectangle	Rectangle	Rectangle	Rectangle
Overall Dimensions L x W x H (in.)	18.5 x 14 x 12	26 1/2 x16 3/8 x 10 3/8	50 x 20 x 9	48 x 13 1/2 x 26	62 x 14 x 26
Outlet Diameter (in.)	-	3/8 NPT	3/8	2-in. female pipe thread coupling	2
Inlet Diameter (in.)	-	3/8 NPT	2	2	2
Material Type	Aluminum	Aluminum	Aluminum	Aluminum	Aluminum
Finish Type	-	Smooth	Diamond plate	Mill	Smooth
UV Inhibitors	-	Yes	-	No	No
Mounting Hardware Included	No	Yes	Yes, mounting tabs	Yes	Yes, mounting tabs
DOT Approved	No	No	Yes	Yes	Yes
Includes	Gauged fuel cap, vented fill cap	Built-in fuel gauge, pickup tube, fuel fill, vented cap	Vented fill cap and dual withdrawal tubes	(2) Built-in vertical baffles	(2) Built-in vertical baffles

Tank Type	General purpose	General purpose	Auxiliary	Transfer/auxiliary–vertical	Transfer/auxiliary–vertical
Mounting Type	On deck	Portable or permanent	Truck bed	Truck bed	Truck bed
Compatible With	Gas or diesel fuel	Gas or diesel fuel	Diesel	Diesel	Diesel
Tank Size (gal.)	13	18	32	70	90
Works With	Boat, generator, pressure washer	Boat, generator, pressure washer	Fits 5, 6, 8 foot truck beds	Fits 5, 6, 8 foot truck beds	Trucks, agriculture equipment, construction
Overall Dimensions L x W x H (in.)	18.5 x 14 x 12	26 1/2 x16 3/8 x 10 3/8	50 x 20 x 9	48 x 13 1/2 x 26	62 x 14 x 26
Outlet Diameter (in.)	-	3/8 NPT	3/8	2-in. female pipe thread coupling	2
Inlet Diameter (in.)	-	3/8 NPT	2	2	2
Finish Type	-	Smooth	Diamond plate	Mill	Smooth
UV Inhibitors	-	Yes	-	No	No
Mounting Hardware Included	No	Yes	Yes, mounting tabs	Yes	Yes, mounting tabs
DOT Approved	No	No	Yes	Yes	Yes
Includes	Gauged fuel cap, vented fill cap	Built-in fuel gauge, pickup tube, fuel fill, vented cap	Vented fill cap and dual withdrawal tubes	(2) Built-in vertical baffles	(2) Built-in vertical baffles

See All Auxiliary-Transfer Tanks

RDS Auxiliary Fuel Tank — 32-Gallon Capacity, Model# 71804

Product Details

Features + Benefits

Key Specs

What's Included

Manufacturer Warranty

Customer Reviews

Product Question + Answer

Top Accessories

Products We Recommend

Auxiliary, Transfer + Skid Tank Accessories

Safety Products

Eye Protection

Fire Extinguishers

Related Products

Compare with Most Popular Auxiliary-Transfer Tanks