Installing an Auxiliary Fuel Tank in my Truck Bed

It's so nice to have this much fuel capacity. No more range anxiety when pulling the 5th wheel. And you now get to watch me install it! Links to everything below.
Compression test video: • How To Easily Compress...
RDS MFG INC Rectangular Auxiliary Fuel Tank - 69 Gallon: amzn.to/3LGbSVM
Auxiliary Fuel Tank Gravity Feed Kit: amzn.to/3RAbf3J
Brass Fuel Line Fittings:
3/8" NPT Male Pipe x 3/8" NPT Female Pipe: amzn.to/3rBbhxu
90 Degree Elbow 3/8 Inch NPT to 3/8 Inch Barb Hose: amzn.to/3PEpJgn
Disclaimers:
As an Amazon Affiliate Associate I earn from qualifying purchases at no cost to you. This video is for entertainment purposes only. Your actions are at your own risk. SeidelRanch videos may contain paid sponsorships. www.SeidelRanch.com

[@SeidelRanch]

It's so nice to have this much fuel capacity. No more range anxiety when pulling the 5th wheel. And you now get to watch me install it! Compression test video: kzbin.info/www/bejne/f6TOZoGPpsetfrM RDS MFG INC Rectangular Auxiliary Fuel Tank - 69 Gallon: amzn.to/3LGbSVM Auxiliary Fuel Tank Gravity Feed Kit: amzn.to/3RAbf3J 3/8" NPT Male Pipe x 3/8" NPT Female Pipe: amzn.to/3rBbhxu

[@Paradoxal-Gaming]

Great video man! Thinking of doing this myself.

[@SeidelRanch]

It's been great to have.

[@pb7133]

Been thinking of doing this for a long time man. Just got a new truck and I think this will be my first upgrade. Hate filling up every couple days.

[@SeidelRanch]

Works awesome. We burn a lot of fuel pulling the RV. This gets us much further.

[@saultube44]

To absob vibration you can buy Sorbothane patches or whatever they have, they have many shapes, and fit it or adapt it. Sorbothane patches are for the front Strut's top assembly, improves absorption a lot; and you can improve even more with SuperSprings/SumoSprings

[@SeidelRanch]

Good info. Thanks.

[@saultube44]

@@SeidelRanch You're welcome bro

[@scottloftin1730]

Nice vid! Thanks. I am doing this on a Ram 1500. Which valve are you referring to that prevents overflow?

[@SeidelRanch]

The float valve in the kit you put on your truck should have it. I also found that if my tank stays at full when driving long distances, my truck (2020 Chevy HD) wants to think the gauge is failing and sets it at empty with a low fuel warning. I have since installed an electric shutoff valve and wired it into my switch box. That fixed it.

[@IzzyFernandez-mn7ty]

Great install. I had the same thing happen to me after my install. Can you send me the link to the electric valve you used? Thanks!

[@SeidelRanch]

I bought this one: amzn.to/4b9eKF5

[@rpmillerthree]

My auxiliary tank has a draw tube so I believe I need to put in a fuel pump. Would I still need a shut off valve if I have an electrical switch and a draw tube?

[@SeidelRanch]

So yours does not have the drain plug to feed from? If you have a feed tube on top, it will need a pump and probably a shutoff to keep it from syphoning the fuel with the pump off.

[@macsway2002]

You to have some support under the tank a plate or rubber mats.

[@SeidelRanch]

I have some foam weather stripping I put to lift it just a bit off the bedliner.

[@GTNBY2]

So what keeps it from overflowing? Is there a check valve somewhere?

[@SeidelRanch]

Yes. The part that connects the auxiliary tank drain hose to the truck's main tank fill hose is a float valve.

[@reecewatkins9174]

@@SeidelRanchcould you provide a link or part number for that check valve? Please and thanks!

[@roelangel2008]

Do you leave the valve open all the time? Im doing this in a couple days and gathering all the info i can when the install is complete.

[@SeidelRanch]

My plan was to do that, but some logic in my truck keeps making it think the fuel gauge is messed up, and then it just shows empty. Since then, I added an electric valve to turn the flow on and off. That way the fuel gauge in my truck works right. I press the button to fill it, then press it again to turn it off. Works great.

[@user-mj8hi9vc7l]

I have a gravity fed fuel tank in my one ton truck. Aluminum tank L shape with toolbox. Use it for work and drive down a lot of gravel roads and access roads for the oil patch. A lot of bouncing as you can imagine. Placed my tank on a piece of plywood and the mounting brackets onto hockey pucks. Forgot I had the valve on to fill my truck from the slip tank. Which overfilled my fuel tank and spilled out the vent ontop of the fuel tank (truck tank) My tank isn’t 2 years old and it’s leaking already. Found that out today.

[@practicaledc8493]

What size home did you drill

[@SeidelRanch]

I believe it was a 3/4" hole to fit the rubber garment and hose.

[@19safe53]

I know transfer tanks are cheàper, but are they safe to use as aux tank?

[@SeidelRanch]

Actually, I have found that auxiliary fuel tanks seem to be cheaper than transfer tanks (at least when I was searching for mine). That said, it's not usually by all that much. Either one will work as an auxiliary tank really, but an aux tank usually has a gravity feed bottom port to drain from and a transfer tank usually has two ports on top. Mine could be either really, because it has a bottom drain port and two ports on top. If you have the bottom port, you can gravity feed from it which makes the setup a little cheaper and easier to install. But if you don't, you can still usually install a small 12 volt pump on it to feed your main tank.

[@daverobbins6059]

Dose it matter if it is gas.or is it the same parts?

[@SeidelRanch]

Gas has different requirements than diesel. I think this tank can carry both, but please check. Gas expansion is much worse with gasoline. Also, pumps have to be different.

[@smokeyjayshouse]

It's a rubber grommet, not a garment.

[@ATeamAdventures]

How much did you pay for the tank?

[@SeidelRanch]

I think it was about $850. I put a link in the description to where I got it.

[@ATeamAdventures]

@@SeidelRanch Thanks! Much appreciated