Dual Fuel Transfer Tank with Pump: The Complete Guide to On-Site Refueling
If you need to carry and dispense two different types of fuel from your truck bed, a dual fuel transfer tank with pump is the most efficient and practical solution available. These DOT-approved systems allow you to safely transport gasoline, diesel, kerosene, methanol, and even aviation fuel in separate compartments, eliminating the need for multiple tanks and messy, time-consuming refueling stops . Whether you operate a farm, run a construction crew, manage a fleet, or simply own multiple vehicles and equipment, investing in a quality split fuel transfer tank with integrated pumps will save you hours of downtime and keep your job site running smoothly.
What Is a Dual Fuel Transfer Tank with Pump?
A dual fuel transfer tank, also called a split fuel transfer tank, is a single tank unit divided into two completely separate compartments. Each compartment holds a different type of fuel, and the best systems come with two dedicated 12-volt electric transfer pumps, hoses, and nozzles—one for each side . This design prevents any cross-contamination between fuels, so you can safely carry diesel on one side and gasoline on the other without worry. Many models are also DOT-approved for carrying kerosene, methanol, ethanol, and aviation fuel, giving you flexibility across a wide range of applications .
The pumps are typically pre-installed and wired directly to your truck's 12V battery system, allowing you to start dispensing fuel as soon as the tank is secured in your truck bed. Most systems pump at 10 to 15 gallons per minute, fast enough to fill a tractor, ATV, generator, or even another truck in just a few minutes .
Key Benefits of Using a Dual Fuel Transfer Tank with Pump
1. Carry two fuels in one trip. The biggest advantage of a split tank is the ability to bring both gasoline and diesel to the same job site. If you have a diesel tractor and a gas-powered generator, you no longer need to make separate trips or carry separate containers. This single-tank solution streamlines your operation and cuts fuel hauling time in half .
2. DOT-approved for legal on-road transport. Many of the top manufacturers, including Transfer Flow and Aluminum Tank Industries, build their split tanks to meet DOT special permit requirements. This means you can legally carry and dispense gasoline, diesel, and kerosene in all 50 states without worrying about fines or red tags from highway patrol . The tanks are tested for drop safety and include rollover valves and baffled interiors to reduce fuel slosh during transport .
3. Built-in hose-purge feature. One of the most practical features on premium dual fuel transfer tanks with pump is the hose-purge mechanism. After you finish refueling, the pump can pull any fuel left in the hose back into the tank. This eliminates messy drips in your truck bed, prevents fuel waste, and keeps your equipment clean .
4. Durable, long-lasting construction. The best dual fuel transfer tanks are made from 12-gauge aluminized steel or heavy-duty aluminum, with a powder-coated black finish that resists rust, corrosion, and UV damage . Some models also use high-density polyethylene for a lighter weight option that still offers excellent durability and chemical resistance . The steel tanks are fully baffled to prevent fuel sloshing, and the pumps are explosion-proof for safe operation with flammable liquids .
5. Versatile mounting options. Split fuel transfer tanks come in rectangular, L-shaped, and low-profile designs to fit nearly any truck bed configuration. L-shaped tanks pair well with existing truck toolboxes, using the space below the toolbox to create a seamless rectangular fit . Many models also include integrated forklift pockets, recessed tie-down points, and lockable fill caps for added security .
Popular Sizes and Configurations
Dual fuel transfer tanks with pump are available in a wide range of capacities to match your specific needs. Here are some of the most common configurations:
50/50 Gallon Split (100 gallons total) – This is the most popular dual fuel system on the market. It features two 50-gallon compartments, each with its own pump, hose, and nozzle. The system is DOT-approved for gasoline, diesel, and kerosene, and pumps at 15 gallons per minute per side. The tank dimensions are approximately 47.5 inches long, 31 inches wide, and 24.4 inches tall, making it a good fit for both short-bed and long-bed full-size trucks . This system is backed by a 6-year unlimited-mileage warranty and is proudly made in the USA .
110 Gallon Split (55/55) – This option gives you two separate 55-gallon tanks (sold as a pair rather than a single welded unit). It features two GPI EZ8 pumps that deliver 8 gallons per minute, with an all-aluminum construction and a black powder-coated finish. The tanks are fully baffled and include four 2-inch bungs for flexible pump and fill cap placement .
105 + 13 Diesel and DEF – If you run modern diesel engines that require Diesel Exhaust Fluid (DEF), this dual-compartment system is the complete solution. It holds 105 gallons of diesel and 13 gallons of DEF in a single roto-molded polyethylene tank. The diesel side includes a 12 GPM DC transfer pump, while the DEF side has a dedicated 4 GPM submersible pump. Both pumps run off the same 12V source, and the DEF tank is removable to create additional storage space .
100 Gallon Dual Cell with Toolbox – This tank is designed for long-bed and flatbed trucks. It features a 60/40 split (approximately 60 gallons and 40 gallons) and a built-in toolbox for storing hoses, chains, and straps. The tank comes with dual 15-GPM Fill-Rite pumps pre-installed, along with 25-foot hose reels and a protective cover to keep the hoses from sun damage. The 14-gauge carbon steel construction is coated with a hammered black powder finish for maximum durability .
60 Gallon Dual Cell (35/25 split) – Built for short-bed trucks, this low-profile tank fits under most bed covers and tonneau systems. It features two completely independent cells welded together to prevent cross-contamination, and includes an integrated locking storage compartment for tools and hoses. The tank is 52 inches wide, 25.5 inches deep, and only 18.5 inches tall, making it one of the most compact dual fuel options available .
72 Gallon Split (36/36) – This aluminum tank is a lighter-weight option, measuring 57 inches long, 18 inches wide, and 18 inches high. It is DOT-approved for gasoline, diesel, kerosene, methanol, ethanol, and aviation fuel. The tank comes without a pump, but you can add an optional GPI 12V transfer pump at checkout .
How to Choose the Right Dual Fuel Transfer Tank with Pump
Selecting the right system comes down to a few key factors:
Fuel types you need to carry. Confirm that the tank is approved for the specific fuels you will use. Most split tanks are built for gasoline and diesel, but some also handle kerosene, methanol, ethanol, and aviation fuel . If you need DEF, look for a dedicated dual compartment system like the AM TANK 105+13 .
Truck bed size and configuration. Measure your truck bed carefully before ordering. Standard full-size short beds are around 5.5 to 6.5 feet, while long beds are 8 feet. The 50/50 gallon Transfer Flow system fits both, but some tanks like the 100-gallon dual cell with toolbox are designed specifically for long beds . Also check for clearance if you have a fifth-wheel prep package, as some Ram trucks may not fit the larger tanks .
Pump flow rate. If you are refueling large equipment or multiple vehicles, consider a pump that delivers at least 10 to 15 gallons per minute. The Transfer Flow system pumps at 15 GPM, which is fast enough for most applications . For lighter-duty use, 8 GPM pumps like the GPI EZ8 are still effective and more affordable .
Material. Aluminum tanks are lighter and resist corrosion, making them a good choice for frequent loading and unloading. Steel tanks are heavier but offer superior durability and impact resistance. Polyethylene tanks are the lightest and most affordable, but they may not be as rigid as metal options .
Warranty. Look for a manufacturer that stands behind their product. Transfer Flow offers a 6-year unlimited-mileage warranty on their steel tanks, while Flog Industries provides a 1-year warranty against manufacturing defects .
Installation Tips for Your Dual Fuel Transfer Tank
Installing a dual fuel transfer tank with pump is a straightforward process, but getting the details right makes the difference between a leak-free system and a constant headache. Here are some essential tips:
1. Use the right thread sealant. Many people grab standard Teflon tape for the pump fittings, but that is a mistake. Standard tape can shred and clog the pump. Instead, use a liquid or paste PTFE sealant that is specifically rated for diesel and gasoline. This ensures a leak-free seal and protects the pump internals .
2. Secure the tank properly. Place a 1/4-inch thick rubber isolator mat under the tank to prevent scratches and dampen vibration. Use Grade 8 bolts and lock washers for mounting. Never rely on bungee cords or ratchet straps alone—the tank must be bolted down to prevent shifting during sudden stops .
3. Wire the pump correctly. Disconnect the negative terminal of your truck battery before starting any electrical work. Run the pump power wire through an in-line fuse holder rated for the pump's amperage (typically 20 to 30 amps). Mount the dash-mounted power switch within easy reach, and use ring terminals for all battery connections .
4. Test the system before you hit the road. After installation, fill each compartment with a few gallons of fuel and run the pump for 30 seconds. Check every fitting for leaks. Pay special attention to the pump inlet and outlet connections, as these are the most common leak points. If you see a drip, tighten the fitting or reapply the thread sealant .
Maintenance and Safety Best Practices
A dual fuel transfer tank with pump is a long-term investment, and a little maintenance goes a long way. Here are a few habits to keep your system running reliably:
1. Keep the tank clean. Dirt and debris in the tank can clog the pump and damage your equipment. Most tanks come with a suction net filter, but you should still inspect and clean the filter regularly. If you are switching between fuel types, drain the compartment completely before adding a different fuel .
2. Check the pump and hoses. Inspect the hoses for cracks, kinks, or wear at least once a month. The pump should be dry and free of fuel residue. If the pump starts making unusual noises or runs slower than usual, it may be time to replace the pump or clean the filter .
3. Use the hose-purge feature. After each refueling session, activate the hose-purge feature (if your system has one) to pull fuel back into the tank. This prevents drips and keeps the hose from hardening over time .
4. Lock the fill caps. All quality dual fuel transfer tanks include lockable fill caps. Use them. Fuel theft is a real problem on job sites and in remote areas, and a locked cap is your first line of defense .
Why You Should Choose KEMSO Fuel Pumps for Your Dual Fuel Transfer Tank
When it comes to fueling your equipment, the pump is the heart of the system. A reliable, high-performance fuel pump ensures that your dual fuel transfer tank delivers fuel quickly, cleanly, and without interruption. That is why we recommend KEMSO fuel pumps for your transfer tank setup.
KEMSO specializes in high-performance, OEM-replacement fuel pumps that are built to last. Every KEMSO fuel pump is designed to meet or exceed original equipment specifications, delivering the exact flow rate and pressure your equipment needs. Unlike generic pumps that may fail after a few months of use, KEMSO pumps are engineered for durability and consistent performance in demanding conditions.
What sets KEMSO apart is their lifetime warranty. When you buy a KEMSO fuel pump, you are not just buying a part—you are buying peace of mind. If your pump ever fails, KEMSO will replace it. No questions, no hassle. That kind of confidence is rare in the fuel pump industry, and it is a direct reflection of the quality they build into every product.
KEMSO offers a wide range of fuel pumps for motorcycles, ATVs, UTVs, jet skis, snowmobiles, cars, and trucks. Whether you need a pump for a Kawasaki Jet Ski, a Subaru Impreza, a Ducati Panigale, a KTM Adventure, a Sea-Doo Speedster, a BMW R1200GS, a Honda CB series, a Husqvarna FE, or a Can-Am Defender, KEMSO has a direct-fit solution. Their pumps are priced at just $79.98, making them an affordable upgrade for any fuel system.
To browse the full selection of KEMSO fuel pumps and find the perfect fit for your equipment, visit kemsoracing.com. Their website lists all available models, and their customer support team is ready to help you choose the right pump for your application.
Final Thoughts
A dual fuel transfer tank with pump is one of the smartest investments you can make for your truck, your equipment, and your productivity. Whether you choose a 50/50 gallon split system from Transfer Flow, a lightweight aluminum tank from Aluminum Tank Industries, or a heavy-duty dual cell model from Flog Industries, the ability to carry two different fuels in a single trip will save you time, money, and frustration .
Remember to measure your truck bed, check fuel compatibility, and always use proper thread sealant during installation . With the right system and a quality pump like those from KEMSO, you will have a reliable mobile refueling station that serves you for years to come.
For more information on high-performance fuel pumps and to secure your lifetime warranty, visit https://www.kemsoracing.com/ today.