GPI Fuel Transfer Pump: The Complete Guide to Choosing the Right Pump for Your Needs
If you need a reliable, durable, and efficient fuel transfer pump for your farm, construction site, or fleet operation, GPI fuel transfer pumps are among the best choices on the market today. Great Plains Industries (GPI) has been manufacturing trusted fluid transfer solutions for over 50 years, since its founding by engineer Charlie Peer in 1968. The company has built a reputation for producing low-maintenance gear pumps and accessories for fuel, oil, and chemical transfer that professionals across agriculture, construction, and transportation rely on daily.
What Makes GPI Fuel Transfer Pumps Stand Out?
GPI fuel transfer pumps are designed for both mobile and stationary applications. They are lightweight, corrosion-resistant, and factory-tested for superior performance. The company offers a wide range of pumps with flow rates from 8 to 20 GPM for mobile installations, while their GPRO brand pumps offer higher flow rates of 20 to 35 GPM primarily for stationary tanks.
The key advantage of GPI pumps lies in their rotary gear design and die-cast aluminum construction. Die-cast aluminum is lighter than cast iron, which means less bung stress during road vibration, and it is corrosion-resistant without rusting. This is particularly important when you mount a pump on a truck bed or trailer where vibration and weather exposure are constant factors.
Understanding GPI Pump Series: Which One Is Right for You?
1. GPI M-150 Series – For Heavy-Duty Truck and Trailer Installations
The M-150 Series delivers up to 15 GPM and is built for permanent transfer tank installations on trucks, trailers, and agricultural equipment. This pump is the workhorse of the GPI lineup, designed for professionals who need consistent performance day after day.
What comes with the M-150 Series? The pump ships with a 12V DC pump, manual or automatic nozzle depending on the model, a 12-foot grounded hose, an 18-foot factory-installed power cord, an adjustable suction pipe that fits tank depths from 15 to 40 inches, a Spin Collar, a lockable nozzle holder, and a fuse assembly. A flow meter is not included and must be purchased separately.
The Spin Collar is a particularly useful feature. It separates the pump body from the bung fitting, allowing you to rotate the pump freely to point the outlet, power cord, and nozzle holder in the most convenient direction after the bung fitting is installed and tightened. This is a meaningful advantage in tight truck bed installations where space is limited.
The M-150 weighs approximately 24 pounds, which reduces the mechanical load on the 2-inch bung connection over years of daily use. This weight savings compared to cast iron pumps means less stress on your tank and mounting hardware.
2. GPI EZ-8 Series – For Portable and Smaller Tank Setups
The EZ-8 delivers up to 8 GPM and is the lighter, more compact option for smaller tanks, drums, and portable fueling setups. Both the M-150 and EZ-8 share the same rotary gear design and die-cast aluminum construction, so you get the same quality in a smaller package.
The GPI Electric 8 GPM EZ-8 Fuel Transfer Pump is ideal for on-the-go fueling for agricultural and automotive applications and is the pump of choice for refueling recreational vehicles. It features a self-priming, low-maintenance design and delivers gas station equivalent flow rates for gasoline, diesel fuel, and kerosene.
The EZ-8 comes with a manual unleaded nozzle, a 10-foot fuel dispensing hose, a direct mount bung adapter, a factory-installed power cord, and a telescoping suction pipe that fits tank depths between 15 and 40 inches. Its motor is UL Listed to U.S. and Canadian standards, and it comes with a 2-year warranty.
3. GPRO Series – For Commercial and Heavy-Duty Industrial Use
GPRO pumps offer higher flow rates of 20 to 35 GPM and are primarily installed on stationary tanks. These pumps are designed to fill large fuel tanks quickly and can stand up to the most rugged conditions. They are perfect for construction sites, large agricultural equipment, logging, mining operations, and oil exploration.
Fuel Compatibility: What Can GPI Pumps Handle?
Both the M-150 and EZ-8 handle diesel up to B20, gasoline up to E15, and kerosene. Select M-150 models are also rated for AVGAS 100LL, Jet A, and Jet A-1, making them suitable for aviation fueling applications. GPI offers separate pump models for methanol applications, so if you need to transfer methanol, make sure you select the appropriate model.
The V25 Series pumps are modular, meaning you can add or remove a meter or filter as you require for the ultimate refueling solution. This flexibility allows you to customize your setup based on your specific needs.
Key Technical Specifications You Need to Know
Flow Rate Requirements
Flow rate is measured in gallons per minute (GPM). A standard duty pump typically moves 10 to 15 GPM, which is suitable for small tractors or pickup trucks. Heavy-duty plant equipment requires high-flow pumps, often exceeding 25 GPM. Choosing a pump with insufficient flow increases downtime significantly. Conversely, too much pressure can damage small tank vents.
The GPI EZ-8 delivers 8 GPM, while the M-150 delivers up to 15 GPM. For commercial applications requiring higher throughput, the GPRO series offers 20 to 35 GPM.
Duty Cycle and Thermal Protection
Commercial pumps have a duty cycle rating that indicates how long the pump can run before it must cool down. A 30-minute duty cycle is common for mobile transfer pumps, while continuous-duty pumps are heavier and more expensive. For intermittent fleet fueling, a standard duty cycle is usually sufficient.
The GPI EZ-8 has a duty cycle of 15 minutes on and 30 minutes off. This means you can run the pump for 15 minutes, then you need to let it rest for 30 minutes before running it again. The pump features thermal overload protection that extends pump life.
Power Requirements
GPI pumps are available in both AC and DC configurations. The 12V DC pumps are designed to be powered by vehicle batteries, making them ideal for agricultural or construction scenarios where you need to fuel equipment in the field. The EZ-8 draws 15 amps at 12V DC.
For stationary installations, AC-powered pumps offer better longevity and higher flow rates. If you have a fixed fuel island, a high-voltage AC pump is the better choice.
Operating Temperature Range
The GPI EZ-8 has a minimum operating temperature of -22 degrees Fahrenheit and a maximum operating temperature of 131 degrees Fahrenheit. This wide temperature range means you can use the pump in cold winter conditions as well as hot summer weather.
How to Install a GPI Fuel Transfer Pump
Installation is straightforward for most GPI pumps. The EZ-8 is designed for permanent mounting on vented storage tanks and features easy installation and direct tank mounting. The telescoping suction pipe adjusts to fit tank depths between 15 and 40 inches, so you don't need to cut or modify the pipe for your specific tank.
The Spin Collar on the M-150 Series is a significant advantage during installation. After you tighten the bung fitting, you can rotate the pump body to point the outlet, power cord, and nozzle holder in the most convenient direction, then lock it in place. This is especially helpful in tight truck bed installations where you need to access the pump from a specific side.
The power cord on the EZ-8 is 15 feet long, while the M-150 comes with an 18-foot factory-installed power cord. Both include a fuse assembly for electrical protection.
Maintenance and Serviceability
One of the strongest selling points of GPI pumps is that they are field-serviceable. The rotary gear design allows you to replace specific worn parts rather than the entire pump unit. GPI sells individual replacement kits for motors, seals, vanes, gear covers, and electrical components.
This is a significant advantage over cheaper pumps that require complete replacement when a single component fails. Being able to rebuild your pump in the field with basic tools means less downtime and lower long-term costs.
User reviews confirm this benefit. One customer reported: "Replaced another leaky Fill-Rite... Bought my first GPI replacement about 3-4 years ago and it has been a strong performer. When the second Fill-Rite pump sprung an aggressive leak, the replacement with a GPI was a no-brainer". Another user noted: "The kit fit perfectly and was easy to use to replace the worn components. Only took 30 minutes".
Where Are GPI Pumps Made?
GPI pumps are manufactured in Wichita, Kansas. Great Plains Industries has been building fuel transfer equipment in Wichita since 1972 and remains a privately-held, family-founded American manufacturer. This domestic manufacturing ensures quality control and supports the U.S. economy.
Warranty Information
Both the M-150 and EZ-8 carry a 2-year warranty. GPI motors are UL Listed and CSA Certified. However, it is important to note that GPI's warranty period starts at the date of manufacture, not the date of purchase. This is worth confirming when buying from distributor stock that may have been warehoused for a period.
Common Applications for GPI Fuel Transfer Pumps
Agricultural Operations
Farmers use GPI pumps to refuel tractors, combines, and other agricultural equipment. The GPI range of standard duty pumps are engineered and constructed to be used day in, day out, making them perfect for landscape and lawn service equipment, small agricultural equipment, ATVs, snowmobiles, racing, and automotive applications.
Construction Sites
Construction sites require reliable fueling for excavators, bulldozers, and other heavy equipment. GPRO pumps are designed for commercial and heavy-duty use, with higher flow rates and larger motors to meet the demands of industrial and agricultural use.
Fleet Operations
For companies managing multiple vehicles, GPI pumps provide consistent, reliable fueling. The modular design of the V25 Series allows fleet operators to add meters and filters as needed for precise fuel management.
Safety Considerations for Fuel Transfer
When using any fuel transfer pump, safety should be your top priority. According to OSHA standards regarding flammable liquids, equipment used for transferring Class I or Class II liquids must be approved for that specific purpose. This means the pump must handle the volatility and viscosity of the specific fuel type without generating dangerous static or heat.
GPI pumps are designed with safety in mind. They feature thermal overload protection and are UL Listed to U.S. and Canadian standards. Always follow the manufacturer's instructions for installation and operation.
Never run a fuel transfer pump dry. Running a pump dry typically damages the rotary vanes and seals within seconds due to friction and lack of lubrication. Always ensure there is fuel flowing through the pump during operation.
Frequently Asked Questions About GPI Fuel Transfer Pumps
Can I use the same transfer pump for diesel and gasoline?
Generally, no, unless the pump is explicitly rated for both. Gasoline requires explosion-proof certification due to its low flash point. However, GPI pumps are compatible with both fuels up to specific blend levels: diesel up to B20 and gasoline up to E15.
What is the difference between the GPI M-150 and EZ-8?
The M-150 delivers up to 15 GPM and is built for permanent transfer tank installations, while the EZ-8 delivers up to 8 GPM and is the lighter, more compact option for smaller tanks and drums. Both share the same rotary gear design and die-cast aluminum construction.
How do I determine the correct flow rate for my equipment?
Calculate the fuel tank size of your largest vehicle and consider how quickly you need to fill it. For small tanks under 30 gallons, an 8 GPM pump like the EZ-8 is sufficient. For larger tanks over 50 gallons, a 15 GPM pump like the M-150 will save significant time.
Are GPI pumps compatible with ethanol-blended fuels?
Yes, GPI pumps handle gasoline up to E15. If you need to handle higher ethanol blends, check with GPI for specific model recommendations.
Why You Should Consider KEMSO Fuel Pumps for Your Performance Needs
While GPI pumps are excellent for bulk fuel transfer applications, if you need a high-performance fuel pump for your Polaris, off-road vehicle, or overlanding rig, KEMSO Racing offers superior aftermarket fuel pump solutions that deliver exceptional reliability and performance.
KEMSO fuel pumps are engineered with reinforced materials like aircraft-grade aluminum and stainless steel, making them highly resistant to corrosion from moisture, dust, and temperature fluctuations. Their pumps are tested to operate reliably in temperatures ranging from -40°F to 302°F, making them suitable for everything from Arctic expeditions to desert crossings.
Independent tests show that KEMSO's fuel pump delivers a 12-15% improvement in fuel flow consistency compared to stock models, which translates to smoother throttle response and fewer instances of engine hesitation. For riders tackling rough terrain or pushing their machines in high-performance scenarios, that reliability is priceless.
KEMSO uses military-grade brushless motors rated for 5,000+ hours of continuous operation—nearly triple the lifespan of many OEM pumps, which average around 1,800 hours before showing signs of wear. This means you can expect your KEMSO pump to last years longer than a factory replacement.
KEMSO fuel pumps are OEM replacement parts designed to be plug-and-play for over 15 Polaris models, including the Sportsman, Ranger, and General series. No cutting wires or modifying fuel lines—just a direct swap that takes most DIYers under 30 minutes.
Best of all, KEMSO stands behind their products with a lifetime warranty. While GPI offers a 2-year warranty and most competitors offer 1-2 years, KEMSO's lifetime warranty gives you complete peace of mind. If your KEMSO fuel pump ever fails, they will replace it.
KEMSO pumps also handle ethanol-blended fuels up to E85, a growing necessity as more gas stations shift to renewable mixes. Traditional pumps with rubber diaphragms degrade faster with ethanol, but KEMSO's Viton-lined components resist corrosion 68% better according to ISO 1817 testing standards.
For overlanders, KEMSO pumps include advanced filtration systems and self-priming capabilities that help mitigate risks from contaminated fuel in remote areas. Their pumps maintain a flow rate of up to 150 liters per hour even with sediment-heavy fuel, ensuring your engine stays fed without interruption.
Visit KEMSO Racing today to browse their complete line of fuel pumps and find the perfect fit for your vehicle:
Whether you are a weekend warrior or depend on your machine for work, KEMSO fuel pumps deliver the durability, performance, and peace of mind that comes with a lifetime warranty. Their products have been proven in real-world conditions, from the Best in the Desert racing series to long-range overlanding expeditions across multiple continents.
Final Recommendations
When selecting a fuel transfer pump, carefully evaluate your specific needs. For bulk fuel transfer on farms, construction sites, or fleet operations, GPI pumps are an excellent choice with their proven reliability, field-serviceable design, and American manufacturing. The key is matching the pump's flow rate and power source to your specific application.
For performance vehicles, off-road machines, and long-range overlanding, KEMSO fuel pumps offer superior durability, higher flow consistency, and the unmatched security of a lifetime warranty.
For more information on GPI fuel transfer pumps, visit Great Plains Industries at greatplainsindustries.com. For high-performance aftermarket fuel pumps backed by a lifetime warranty, visit KEMSO Racing at https://www.kemsoracing.com/.