Dual Tanks
Has anyone that has or has had dual gas tanks tied the two together? I do not mean the fuel lines but the actual tanks themselves? If so how did you do it and how did it work after you tied the two together?
Forum Discussion
3 Replies
- Good Morning, Yes the two tanks on my 1984 Ford E-350 24" Class-C Jamboree are tied together with a crossover hose. It was that way when I bought it ten years ago.
The factory tank is right behind the rear axle and someone had a second tank installed about ten inches behind that. The factory tank uses the stock gas fill opening, sending unit for the gas gauge, the vent and fuel return lines and the generator fuel pick up, are all stock on the stock tank. The second tank is tied to the fuel venting system via a "T" fitting splicing into the vent line on top of the stock tank.
The second tank is more shallow in depth but wider and longer so it has the same capacity as the stock tank but the bottom of the second tank is about half way down the stock tank. The front bottom center of the second tank has a one inch fuel line connecting it to the rear center of the stock tank.
So when you fill the stock tank the second tank begins to fill after the stock tank is half full, then both tanks fill through the crossover hose until they both are full.
As you use the fuel the second tank flows into the stock tank via gravity until it is empty. So in essence the second tank is just a vessel that gas flows back and forth to the stock tank with just an addition of a single vent line. Having only one fill point is a plus too.
The stock tank has a flange with a gasket bolted to the tank for the hose, the second tank has a welded nipple.
If you look at any Big Rig Truck on the highway that has dual tanks they all have a crossover tube connecting the tanks together. It is usually only about a 1/2" to 5/8" diameter line but they don't need a fast flow for filling as they have fill caps on both tanks.
The only place I could find 1" fuel hose is McMaster Carr. My two tanks are about 40 gallons each.
Good luck, Gary - One of our OPs has two tanks tied together. Might be GrillMeister. He'll be along.
- Best to keep fuel tanks separate for practical and safety reasons. Airplanes keep them separate allowing you control weight distribution and problems, example: in case one tank should get damaged, leak or receive contaminated fuel or water.
