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Old 11-06-2018, 01:19 AM   #1
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Bed mounted Aux fuel tank

I have some questions about aux fuel tanks for those of you that have or have had them:
1. Is it common to see them setup to pump directly to the main fuel tank? If so does a kit exist? If not, why?

2. Most everything I’ve seen is for diesel applications, I’m thinking about adding an aux tank to my gas 2500 HD. However, before we get all fired up, I believe I understand the difference between a combustible and a flammable and I also believe I understand the legal ramifications if something bad happens.

So, If any of you have done just what I’m thinking about doing I’d like to hear about it. If you just want to tell me I’m an idiot, well that’s fine too.

Here’s what I’ve got: 2007 Chevy Silverado 2500HD 6.0ltr
What I want to do is mount a 20 or 30 gallon tank in the bed and wire up a 12v pump that pumps from the drain plug of the aux tank to my main tank. I’d like to wire it to a toggle switch in the cab. I can’t think of I reason why I can’t make this work safely.
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Old 11-06-2018, 08:12 AM   #2
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There is a place in Louisiana east of slidell that has them made of aluminum for gas engines. Iím actually looking at getting one for my tundra. They have different sizes DOT approved. The place is called north shore trailers. The only thing it is gravity transfer. With some smarts it can probably be slightly modified for ease of use. The bottom line is it is DOT APPROVED. If I remember they were around $495.00. Diamond plate aluminum and they had several on display.
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Old 11-06-2018, 05:22 PM   #3
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Google Transferflow tanks. You can buy different sizes but I believe they are 12 volt pumps. If something ever happens to my hundred gallon tank Iíll buy one from them. We have to stop ever so often to use the bathroom and then I fill the truck up. In five minutes I can fill my tank. I think the pump pumps 8gal a minute. You can put gas or diesel in the tank. My tank is homemade and uses a 12 volt pump. We can stop use the bathroom fill up the truck get something to eat and be back on the road in 15 minuets or less. Plus we donít ever pull into a truckstop or buy expensive fuel in truckstops
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Old 11-06-2018, 05:39 PM   #4
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Diesel is classified as a non flammable liquid, gasoline as a flammable liquid, a world of a difference in safety and regulations. For starters DOT approved only with the necessary documentation and you may still have difficulties when boarding ferries or driving through certain tunnels because the tank is an addon and not integrated - do your homework.
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Old 11-06-2018, 10:11 PM   #5
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Either way they are available and DOT APPROVED for gas!! ferry or tunnel can be avoided. Modifications are always a plus!
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Old 11-07-2018, 02:23 PM   #6
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I carry a 5 gallon can of gas. Don't want to carry the extra weight and don't mind stopping every few hours.
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Old 11-07-2018, 03:56 PM   #7
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I have used the RDS tanks for years. I like the 60 gallon tank with a 6" tool box on top. You can mount a pump to them and you can buy the gravity transfer attachment that connects it to your filler pipe. They are made for diesel but there are plenty of gas trucks running around with gas in them.
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Old 11-07-2018, 04:06 PM   #8
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One day I drove from central Kentucky to Florida stopping only to pee and had plenty of fuel when I got home. For all the nay sayers, I never worry about looking for fuel pumps that will fit my 38 foot 5th wheel, just don't worry about fueling at all.

There are many options out there, get what you are comfortable with and hit the road.
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Old 11-07-2018, 04:40 PM   #9
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Although my set up is for Diesel fuel, I have a 40Gal Titan aux tank. It has an embedded pump, ties into the truck's tank vent tube. I have a nice LED control unit in my cab, which when I activate it, pumps 5G in 10 minutes as I drive along and shuts off. I just turn it on to pump in more.

They may have something for gasoline....I never checked.
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Old 11-07-2018, 05:02 PM   #10
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I have a 50g transfer flow for diesel. They are available for gas, but not sure what model. Mine connects to the vent line to the main tank. The tank has a low-volume pump built into the tool box portion. My on-board tank is the optional (when built) 42g.

Living out here in Arizona, we boondock often. There are some really long stretches out here without fuel. We love the ability to fuel when we WANT to, not when we HAVE to. Plus, gives us the ability to buy fuel when we see it cheaper than the interstate. Just after I got it, we went to Oregon from AZ, thru California. At the time, diesel was over 1.00 more per gallon in CA. We were able to bypass getting gas in CA and saved almost 100.00 each way. Bought my tank from Craigslist. Almost paid for itself in just one trip, and ended the aggravation of finding fuel.
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