How to Connect Two Diesel Fuel Tanks?

[TessaLynn]

Connect the bottoms of the two fuel tanks directly with a fuel pipe, avoiding any bends. Install a 3-way connector on the outlet pipe of the main fuel tank: one connected to the main fuel line, one to the main tank, and the other to the auxiliary tank. Install a separate switch on the fuel pipes leading to both the main and auxiliary tanks. When using the main tank, open the switch on the pipe connected to the main tank.

[DelGabriella]

I've handled quite a few diesel truck fuel tank modifications before. The key to connecting two tanks is installing a connecting pipe, such as a copper tube or rubber hose, with one end connected to the outlet of the main tank and the other to the inlet of the auxiliary tank. It's best to add a valve in the middle to control the flow and prevent automatic fuel transfer that could cause imbalance. Choose pressure-resistant and corrosion-resistant materials for the piping to avoid leaks or ruptures. During installation, ensure tight seals to prevent air from entering the system, which could cause the engine to stall. I recommend checking pipe joints and valves for looseness every few months, especially in winter when fuel tends to condense. If possible, adding a fuel transfer pump provides extra security. Above all, safety first—wear gloves and goggles when doing it yourself.

[MarianaMarie]

I installed a second diesel tank on my pickup truck, and the connection method is quite straightforward. I used a rubber hose to link the two fuel tanks, with a three-way valve installed in between. The valve stays closed normally and opens when fuel is running low to allow the fuel to flow over. The piping must be connected from the bottom to prevent air bubbles from getting in. Don't forget to check the hose for aging or cracks—I replace it with a new one every six months. In terms of fuel consumption, dual tanks can extend the driving range, but make sure the fuel quality is consistent to avoid clogging the filter. After installation, it's best to test drive to ensure smooth valve switching. If there's any fuel leakage, repair it immediately—diesel is hard to wash off if it splashes on your skin.

[OscarRose]

When learning car repair, the teacher taught the method for connecting diesel fuel tanks. Basically, it involves using a pipe to connect two fuel tank outlets, with a valve controlling the switch. Beginners often make mistakes like bending the pipe and blocking the fuel line, or not installing the sealing ring properly, leading to leaks. I've tried using copper pipes for better durability, but installation requires professional tools for clamping. It's also a good practice to replace the valve regularly to prevent rust and jamming. Additionally, fuel may clump in large temperature differences, so adding a heating belt can prevent blockages. In short, start with the basics and gradually learn the details.