The best 45 gallon transfer tanks provide reliable fuel storage, transfer capability, and mounting versatility for trucks, tractors, boats, and job sites. This guide highlights five solid choices, explains who they’re best for, and notes any limitations to consider. Use this overview to compare capacity-focused models, material differences, and built-in features that affect usability and durability on the job.
| Product | Best For |
|---|---|
| RDS MFG INC 71083 | Rigid metal tank with top-entry siphon and welded seams for durability |
| RDS MFG INC 71083PC | Compact, US-built option with simple dimensions for tight mounts |
| STMGW Aluminum Rectangular 45 Gal | Lightweight aluminum, corrosion resistance, versatile mounting |
| Better Built 36-Gallon | Higher overfill protection and internal baffles for stability |
| Garvee 45 Gallon Fuel Caddy | Mobility and ease of pumping for field work |
RDS MFG INC 71083 Rectangular Auxiliary Tank

This 45-gallon rectangular tank emphasizes durability with fully welded seams and a design that supports gasoline auxiliary fueling when siphoned from the top using an electric pump. It is best for buyers who need a robust, fixed-mount solution for steady on-site fueling. The top-entry capability helps streamline transfers, but ensure compatibility with your vehicle’s mounting layout and pump setup.
Who it’s best for: Fleet operators or land-based contractors seeking a rugged, fuel-dedicated tank with a straightforward top-entry transfer method. Why selected: strong welds and a versatile capacity align with long-term use in demanding environments.
Caution: Confirm that the mounting space and electrical pump configuration fit your truck bed or trailer before purchase.
RDS MFG INC RDS MFG 71083PC INC Transfer Tank

This 45-gallon unit offers a compact footprint with measurements listed (57.0″ L x 9.5″ W x 20.0″ H) and is described as an auto accessory. It suits applications where space is a premium but capacity remains essential. It’s better for setups needing a slim tank profile that fits tight mounting bays or trailer compartments.
Who it’s best for: Vehicle operators needing a narrow, space-conserving transfer tank. Why selected: a balance of 45 gallons and slim dimensions helps with vehicle-mounted configurations.
Caution: Verify mounting clearance and compatibility with existing accessories since dimensions are critical for fit in restricted spaces.
STMGW Aluminum Rectangular 45 Gal Tank

This aluminum, 45-gallon rectangular tank emphasizes corrosion resistance and lightweight durability. It is well-suited for mounting in various truck bed configurations and for users prioritizing aluminum construction to reduce overall vehicle weight. The top-entry design supports straightforward fueling and transfer operations.
Who it’s best for: Operators seeking a non-ferrous, corrosion-resistant transfer tank with good space efficiency. Why selected: aluminum construction offers durability without excessive weight.
Caution: Aluminum tanks can be more costly than steel options; confirm mounting hardware compatibility for a secure fit.
Better Built Steel Transfer Tank 36-Gallon

This option delivers a larger-disciplined 36-gallon capacity with built-in overfill restriction to prevent spills and internal baffles to minimize shifting during transport. It is best for users who transport fuel frequently and require enhanced containment integrity. A slightly smaller capacity than the 45-gallon models may be a trade-off when space or weight limits exist.
Who it’s best for: Fleet operators or individuals who prioritize spill prevention and load stability. Why selected: overfill protection and baffles improve safety during movement.
Caution: The 36-gallon capacity is lower than 45 gallons, so assess whether this meets your range needs before purchase.
Garvee 45 Gallon Fuel Transfer Tank with Pump

The Garvee 45-gallon caddy emphasizes mobility with a two-way rotary pump for flexible dispensing and siphoning. It includes a fill gauge, a securing ground clamp, and wheels that enable easier transport to field locations. It’s a strong pick for on-site tasks where fuel needs to be delivered to multiple work areas or equipment.
Who it’s best for: Mobile crews and workshop environments requiring easy dispensing and transport. Why selected: rotary pump and gauge support quick, controlled fueling in varied locations.
Caution: The rotary pump mechanism requires manual effort; expect some effort for long pumping sessions and ensure battery-free operation is adequate for your workflow.
Buying Guide: Key Considerations for 45-Gallon Transfer Tanks
- Material: Steel offers rugged durability; aluminum reduces weight and resists corrosion; evaluate the trade-offs based on vehicle load limits and exposure to elements.
- Mounting and space: Measure available bed length, mounting rails, and trailer clearance. Slim profiles help in tight spaces but may limit capacity or access.
- Fuel compatibility: Confirm whether the tank supports gasoline, diesel, or other fuels. Some tanks are optimized for specific fuels or notched corners for fit.
- Seam integrity: Welded seams improve durability. Look for reinforced seams or baffles to reduce fuel movement during transport.
- Safety features: Overfill protection,anti-static considerations, ground clamps, and secure caps reduce spill risks and improve handling.
- Pump options: Consider whether a built-in pump or external pumping method suits your workflow, including manual vs. electric options.
- Weight and handling: Heavier steel tanks can affect fuel economics and vehicle handling. Aluminum variants offer weight savings for transport.
- Price vs. value: Balance upfront cost with long-term durability, maintenance, and fuel compatibility for total cost of ownership.
Frequently Asked Questions
- What is a 45 gallon transfer tank best used for? It serves as on-site fuel storage and a portable transfer option for trucks, tractors, boats, and heavy equipment, enabling refueling at remote locations.
- Are aluminum transfer tanks better than steel? Aluminum is lighter and corrosion-resistant, which benefits fuel efficiency and mounting flexibility; steel offers greater impact resistance and often lower upfront cost.
- Do transfer tanks require special mounting hardware? Yes, ensure compatible mounting brackets, bolts, and seals fit your vehicle’s bed or trailer frame and follow the manufacturer’s install guidance.
- Can these tanks handle diesel and gasoline? Many models are designed for multiple fuels, but verify the product specifications for your chosen tank to match your intended fuel type.
- What maintenance is needed for transfer tanks? Regular inspection of seals, fittings, and welds; clean the exterior to prevent corrosion (steel) or buildup inside the tank; check the pump operation if included.
- Is a built-in pump necessary? Not always. A pump adds convenience for frequent dispensing, but a siphon or manual transfer method can suffice for occasional use.