Fill-Rite FR4204H 12V 20 GPM Fuel Transfer Pump (Pump Only) — Cast Iron, Rotary Vane, Thermal Overload

The Fill-Rite FR4204H is a 12V, 20 GPM rotary-vane fuel transfer pump (pump only) built in cast iron for reliable mobile fuel transfer of gasoline, diesel, kerosene, ethanol/methanol blends up to 15%, and biodiesel up to B20.

The FR4204H is a heavy-duty, truck- and trailer-mounted pump designed where dependable flow and long life matter. This "pump only" package includes a 1" street elbow, 5' 12 GA ground wire, two wire nuts, and PTFE tape so you can finish plumbing and wiring quickly. Built around Fill-Rite's Rotary Vane Technology with thermal overload protection and a rotatable junction box, the FR4204H balances consistent performance with straightforward installation and serviceability.

How quickly will this pump move fuel on my truck or trailer?

The FR4204H delivers up to 20 gallons per minute when powered by 12V battery systems, making it well suited for rapid refueling or bulk transfer. It pulls from tank depths down to 8 feet and can push liquid to vertical discharge heights near 37 feet, depending on hose and fittings used.

• Rated flow: 20 GPM (12V operation)
• Suction capability: up to 8 ft tank depth
• Discharge lift: up to ~37 ft, depending on plumbing
• Rotary vane design for steadier flow as parts wear

What fuels can the FR4204H handle safely?

This model is engineered to transfer common hydrocarbon fuels and approved blends within manufacturer limits. It supports gasoline, diesel, kerosene, ethanol/methanol blends up to 15%, and biodiesel up to B20 when used with appropriate hoses and fittings for those fuels.

• Gasoline, diesel, kerosene included
• Ethanol and methanol blends supported up to 15%
• Biodiesel compatibility up to B20
• Always match seals and hoses to fuel type for best longevity

How difficult is installation and electrical hookup?

Fill-Rite designed the FR4204H for simpler mounting and wiring in cramped spaces. The junction box rotates 180 degrees so you can orient conduit and cable for easy access, and basic wiring hardware is included to get you started.

• Includes 1" street elbow and PTFE tape for plumbing
• Supplied 5' 12 GA ground wire and wire nuts for connections
• Rotating junction box eases wiring in tight installs
• Thermal overload protection reduces risk of motor overheating

What construction and durability features should I expect?

Built with cast-iron housing and internal rotary vane components, the FR4204H is meant for frequent, rugged use. Fill-Rite backs the 4200 series with a limited lifetime warranty and incorporates safety and performance features to extend service life under mobile conditions.

• Cast-iron construction for impact and wear resistance
• Rotary Vane Technology keeps flow consistent over time
• Thermal overload protection for abnormal operating conditions
• Made in the USA with globally sourced materials

Who this is for: If you need a robust, high-flow 12V pump for truck- or trailer-mounted fuel transfer that handles common fuel blends and prioritizes durability and easy wiring, the FR4204H is a strong fit. It’s aimed at fleet operators, contractors, farmers, and mobile service providers who require fast transfer rates, field-serviceable design, and compatibility with gasoline, diesel, kerosene, and approved bio-blends. Choose this model when you want a proven rotary-vane pump that balances performance and longevity for heavy-duty mobile fueling tasks.