Need advice on Aux Fuel Tank

Those things aren't my cup of tea. I also have the 6.7 in a 350 dually. I pull a 38ft. MS and we look forward to stopping for gas just for the break. And I have read on here that those things increase you chances of getting water in the fuel. Not for me.

I have a gravety feed 45 gal and it works great for what I need. Im glad I did not spend more would have been for no reason.

Tow Vehicles might be a better forum for this. Here's a thread about one brand in TV.

I have a compo 50 gal fuel and tool box by Transfer Flow with the auto transfer of fuel and monitor system. I have had it for 4 years. great system. it is flush to the top of the bed. would buy it again.

Lillyputz

I have a gravity feed one from northern tool. 50 gallon with tool box. I have used for 4 years without any problems. Love it. Also no water the last time I changed my fuel filter, not a drop after 20k and over a year on my truck. I believe the water thing is a myth. JMHO

I have an RDS from northern tool. 50 gal with tool box Gravity feed. Had trouble with the computer check enoine light came on. The computer dosen't like the fact that you are putting on miles but the tank is remaining full. Did not affect anything other than the light coming on. Solution" I drive with the valve open, filling the tank. Eventually stop for potty break, turn off fuel. Run off until the next break and turn it back on. Computer happy. I'm happy that I can get gas without having to manuever around cars, islands,etc. No water in line. why should the gravity feed be any differant than the transfer flow. a tank is a tank. only differance MONEY

They are wonderful since you don't have to worry about getting into and out of fuel stations with the trailer attached, just fuel up at the end of the day after you've dropped the trailer. We have a manual fill pump and spigot that fill the truck tank with. It helps break up the day and by the time the tank is getting low we are more than ready for a break. Probably have around $450 in our 40 gallon tank.

Just love it!!

Gravity feed is DOT approved as long as you aren't feeding an injector or carburetor. It's a myth that some people like to put out there that haven't fully read the statutes.

I have an ATI 46 gallon in my truck. Gravity feed took me all of 2hrs to install everything, and that was going very slow. The hardest part was pulling out my metal filer neck to be able to cut it down to put the "T" in. Mine was about $600 shipped with all hardware.

I'm on my second one. The first was in my 97 K2500, a 100 gal L-shaped tank. My present one, which I like better is a RDS 80 gal. The RDS has a roll over check valve in the top. I plumbed it into the filler neck vent line, this keeps both tanks at the same pressure.
Both tanks were gravity fed into the filler neck. Manual lever operated ball valves at the tank, 12v solenoid valves located under the bed with activation switch on the dash. Mine are gasoline.

Just bought a 58 gallon tool box fuel tank combo. I like to stop for breaks where i choose, not necessarily a fuel station that may be crowded or hard to get in and out of. I also added a 3 micron add on filter after the factory filter. I bought mine from someone that never used it and got a deal at $450.00. I'm hooking it up with a pump to fuel while driving and avoid a possible spill that a gravity system could cause.