A strong 20-gallon transfer tank should match the fuel or fluid being moved, the way you dispense it, and whether it needs to travel on wheels or in a truck bed. The TUFFIOM 20 Gallon Fuel Caddy is a strong fit for mobile fueling: it has a reversible manual siphon pump, an 8.9-foot hose, and wheels. This roundup compares six products with different jobs, including three wheeled fuel caddies, two aluminum auxiliary tanks, and an air-operated waste-oil drain.
Those differences matter: a tank made for diesel in a pickup bed is not interchangeable with a portable gasoline caddy, and an oil drain is intended for used fluid rather than routine fuel transfer. Check the application and specifications before choosing.
The TUFFIOM 20 Gallon Fuel Caddy leads for mobile fuel transfer because it combines a 20-gallon capacity, wheeled alloy-steel tank, reversible manual siphon pump, and included 8.9-foot hose. Its pump can dispense or siphon fuel, while the wheels help move the caddy around. If you need a truck-bed tank instead, consider the RDS Aluminum 74551, which is described for transferring diesel and other nonflammable liquids from a pickup to remote equipment.
Our Top Picks
Its 20-gallon alloy-steel tank pairs wheels with a reversible manual siphon pump and included 8.9-foot hose for mobile dispensing or siphoning.
View on Amazon
Stainless Steel CaddyThe 20-gallon portable caddy uses 201 stainless steel and includes wheels and a two-way manual rotary pump for mobile fuel handling.
View on Amazon
Bi-Directional PumpThis 20-gallon carbon-steel caddy has a bi-directional hand pump for dispensing or siphoning and is listed as compatible with gasoline and diesel.
View on Amazon- Pickup-Bed Transfer RDS Aluminum 74551
- Compact Auxiliary Tank RDS Aluminum 72587
Compare These 20-Gallon Tank Options
| # | Product | Capacity | Material | Weight | Dimensions | Buy |
|---|---|---|---|---|---|---|
| 1 | 1. TUFFIOM 20 Gallon Fuel CaddyBest Overall | 20 gallons | Alloy Steel | 25 kg | 18.7"W x 34"H | View on Amazon |
| 2 | 2. COZONY Portable Fuel TankStainless Steel Caddy | 20 gallons | — | 51.2 lb | 19.69"W x 48.03"H | View on Amazon |
| 3 | 3. VEVOR Fuel Gas CaddyBi-Directional Pump | 20 gallons | Carbon Steel | 38.6 lb | 19.29"W x 36.61"H | View on Amazon |
| 4 |  4. RDS Aluminum 74551Pickup-Bed Transfer | 20 gallons | Aluminum | 80 lb | — | View on Amazon |
| 5 |  5. RDS Aluminum 72587Compact Auxiliary Tank | 20 gallons | Aluminum | 30 lb | — | View on Amazon |
| 6 |  6. VEVOR Waste Oil Drain TankShop waste-oil service bays | 20 gallons | premium steel | 30.9 lb | — | View on Amazon |
Detailed Reviews: Best 20 Gallon Transfer Tank
#1 · Best Overall
1. TUFFIOM 20 Gallon Fuel Caddy
- Capacity: 20 gallons
- Material: Alloy Steel
- Weight: 25 kg
- Dimensions: 18.7"W x 34"H
Best for: Wheeled fuel delivery for equipment.
Why it ranks #1: Its 20-gallon alloy-steel tank pairs wheels with a reversible manual siphon pump and included 8.9-foot hose for mobile dispensing or siphoning.
An 8.9-foot hose paired with a reversible rotary pump lets this TUFFIOM caddy deliver fuel and draw hose contents back into the tank. The 20-gallon capacity and wheels suit users moving fuel among equipment such as ATVs, cars, mowers, tractors, boats, and motorcycles.
The reversible hand pump supports dispensing or siphoning, and its ability to pull remaining fuel back through the hose can help limit leftover fuel in the line after a transfer. The 8.9-foot hose gives the caddy reach between its position and the equipment being fueled, while the kink-free hose is specified for flow. Heavy-duty eight-inch pneumatic tires with steel rims support moving the 20-gallon tank around a work area.
- 20-gallon capacity
- Reversible rotary hand pump dispenses or siphons fuel
- Pump can draw hose fuel back into the tank
- 8.9-foot kink-free hose and eight-inch pneumatic tires
- Fuel transfer is powered by a manual hand pump.
Skip it if you need air-operated waste-oil drainage rather than manual fuel transfer; VEVOR model 917 is an air-operated 20-gallon oil drainer.
For owners who transfer fuel to outdoor power equipment, vehicles, or boats, this wheeled caddy combines a reversible pump with a long hose. It uses manual pumping, so account for that workflow when handling repeated transfers.
Full product details
| Brand | TUFFIOM |
|---|---|
| Capacity | 20 gallons |
| Color | Yellow |
| Item Dimensions W x H | 18.7"W x 34"H |
| Item Weight | 25 kg |
| Manufacturer | TUFFIOM |
| Material | Alloy Steel |
| Model Number | 20Gallon-Yellow |
| Dimensions | 18.7"W x 34"H |
Listed on Amazon as: TUFFIOM 20 Gallon Fuel Gas Caddy w/Wheels & Manual Siphon Pump, Portable Diesel Fuel Transfer Storage Tank w/8.9ft Hose, Gasoline Can Container for ATV Car Mowers Tractor Boat Motorcycle
View on Amazon#2 · Stainless Steel Caddy
2. COZONY Portable Fuel Tank
- Capacity: 20 gallons
- Weight: 51.2 lb
- Dimensions: 19.69"W x 48.03"H
Best for: Mobile fuel handling for steel-tank buyers.
Why it ranks #2: The 20-gallon portable caddy uses 201 stainless steel and includes wheels and a two-way manual rotary pump for mobile fuel handling.
A 201 stainless-steel tank gives this COZONY caddy a rugged alternative to plastic fuel containers for mobile fueling. Its 20-gallon capacity, wheels, and two-way manual rotary pump support moving fuel to equipment around farms, marinas, and auto repair shops without depending on an electric pump.
The 20-gallon capacity provides a larger mobile supply for fueling tasks, while the two-way manual rotary pump offers a hand-powered transfer method. Wheels support moving the caddy between storage and equipment, and the stainless-steel construction with red powder-coated finish is specified for rust, UV, and dent resistance. At 51.2 pounds, this is a substantial unit to account for when planning where to keep and maneuver it.
- 20-gallon fuel capacity
- 201 stainless-steel construction with red powder-coated finish
- Two-way manual rotary pump
- Wheels support mobile fueling
- At 51.2 pounds, it is a substantial caddy to maneuver.
Skip it if you need a compact auxiliary tank mounted in a pickup bed; the RDS 74551 is a 50-by-21-by-7-inch truck tank.
Farm, marina, and auto-shop users seeking a wheeled 20-gallon fuel caddy can benefit from its manual pump and steel construction. Consider its 51.2-pound weight when choosing storage and planning how often to move it.
Full product details
| Brand | COZONY |
|---|---|
| Capacity | 20 gallons |
| Color | Red |
| Item Dimensions W x H | 19.69"W x 48.03"H |
| Item Weight | 51.2 pounds |
| Manufacturer | COZONY |
| Dimensions | 19.69"W x 48.03"H |
Listed on Amazon as: 20 Gallon Portable Fuel Storage Tank Container w/Pump & Wheels
View on Amazon#3 · Bi-Directional Pump
3. VEVOR Fuel Gas Caddy
- Capacity: 20 gallons
- Material: Carbon Steel
- Weight: 38.6 lb
- Dimensions: 19.29"W x 36.61"H
Best for: Manual gas-and-diesel fueling.
Why it ranks #3: This 20-gallon carbon-steel caddy has a bi-directional hand pump for dispensing or siphoning and is listed as compatible with gasoline and diesel.
A bi-directional hand pump lets this VEVOR caddy dispense or siphon fuel by turning the handle clockwise or counterclockwise, making it useful where reliable power is unavailable. Its 20-gallon capacity is compatible with gasoline and diesel for fueling multiple vehicles or pieces of equipment.
The hand-powered pump offers a transfer option for locations without reliable power, while its two rotation directions support both dispensing and siphoning. A 20-gallon tank can hold fuel for multiple vehicles or equipment, potentially reducing refill trips during lawn care or outdoor use. Carbon-steel construction gives the caddy a steel tank body, and its listed dimensions of 19.29 by 36.61 inches help buyers plan storage space.
- 20-gallon capacity
- Compatible with gasoline and diesel
- Bi-directional hand pump dispenses or siphons fuel
- Carbon-steel construction
- Fuel transfer depends on operating the hand pump.
Skip it if you need a reversible pump with an 8.9-foot hose and pneumatic wheels; TUFFIOM’s 20-gallon caddy lists those features.
This VEVOR suits users needing a portable 20-gallon supply of gasoline or diesel for vehicles and equipment, especially where reliable power is unavailable. Its transfer method is manual, and its listed dimensions help determine storage fit.
Full product details
| Brand | VEVOR |
|---|---|
| Capacity | 20 gallons |
| Color | Red |
| Item Dimensions W x H | 19.29"W x 36.61"H |
| Item Weight | 38.6 pounds |
| Manufacturer | VEVOR |
| Material | Carbon Steel |
| Model Number | 20 Gallon Fuel Gas Caddy Red |
| Dimensions | 19.29"W x 36.61"H |
Listed on Amazon as: VEVOR 20 Gallon Fuel Gas Caddy, Carbon Steel, Portable Fuel Transfer
View on Amazon#4 · Pickup-Bed Transfer
4. RDS Aluminum 74551
- Capacity: 20 gallons
- Material: Aluminum
- Weight: 80 lb
Best for: Pickup-bed diesel transfer tank.
Why it ranks #4: Its 20-gallon aluminum tank is designed to transfer diesel and other nonflammable liquids from a pickup bed to remote or heavy equipment.
A combined fuel tank and storage box is the defining feature of this RDS aluminum unit, giving pickup owners a way to carry diesel for remote or heavy equipment while using the top as storage. Its 20-gallon capacity and fully welded seams suit a dedicated truck-bed installation.
The 50-by-21-by-7-inch rectangular profile provides a low, broad form for a pickup bed, while heavy-duty aluminum mounting brackets support mounting the tank. RDS describes it for transferring diesel and other nonflammable liquids to remote or heavy equipment, so it fits work where fuel must travel with the truck. The tank is pressure-tested and submerged to check for leaks; diesel installation kits are available separately.
- 20-gallon aluminum tank
- Combines a transfer tank with a storage box on top
- Heavy-duty aluminum mounting brackets
- Fully welded seams; pressure-tested and submerged for leak testing
- The listed diesel installation kits are sold separately.
Skip it if you need a compact exterior tank for a generator and do not need a pickup-bed storage box; the RDS 72587 has a 20-by-18-by-14-inch profile.
Pickup owners carrying diesel or other nonflammable liquids to remote equipment may value the aluminum tank, mounting brackets, and top storage box. The listed installation kits are separate, so account for that when planning the setup.
Full product details
| Brand | RDS MFG INC |
|---|---|
| Capacity | 20 gallons |
| Compatible with Vehicle Type | Truck |
| Included Components | Fuel Tank,New |
| Item Dimensions | 50 x 21 x 7 inches |
| Item Weight | 80 pounds |
| Dimensions | 50 x 21 x 7 inches |
| Manufacturer | RDS MFG INC |
| Part Number | 74551 |
| Manufacturer Warranty Description | Manufacturer Warranty |
| Material | Aluminum |
| Model Number | 74551 |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: This product can expose you to chemicals including styrene which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov |
Listed on Amazon as: Rds Aluminum 74551 20 Gal Rectangular Auxiliary Fuel Tank44
View on Amazon#5 · Compact Auxiliary Tank
5. RDS Aluminum 72587
- Capacity: 20 gallons
- Material: Aluminum
- Weight: 30 lb
Best for: Compact diesel auxiliary storage.
Why it ranks #5: This 20-gallon aluminum auxiliary tank measures 20 x 18 x 14 inches and includes dual withdrawal tubes, with a second tube usable for diesel return.
Dual withdrawal tubes distinguish this 20-gallon RDS aluminum tank, with the second tube usable as a diesel fuel return. Its vented fill cap and compact 20-by-18-by-14-inch dimensions support specialty diesel applications such as supplying a generator, while its listed use excludes gasoline.
The dual withdrawal tubes give the tank two withdrawal connections, and the product description identifies the second tube for a diesel fuel return. A vented fill cap is included, while the 20-by-18-by-14-inch form measures smaller than a long pickup-bed tank and can suit a generator or other specialty application. The aluminum construction keeps the tank material specified, but users must follow applicable requirements for transporting, loading, and discharging contents.
- 20-gallon aluminum tank
- Dual withdrawal tubes
- Second tube can serve as a diesel fuel return
- Vented fill cap; 20-by-18-by-14-inch dimensions
- The tank is not intended for gasoline.
Skip it if you need a pickup-bed tank that combines fuel storage with a top storage box; the RDS 74551 is specified for that arrangement.
Generator owners and users of other specialty diesel applications may find the compact aluminum tank and diesel-return tube useful. It is not intended for gasoline, and transportation, loading, and discharge must meet applicable requirements.
Full product details
| Brand | RDS MFG INC |
|---|---|
| Capacity | 20 gallons |
| Compatible with Vehicle Type | Boat |
| Item Dimensions | 20 x 18 x 14 inches |
| Item Weight | 30 pounds |
| Dimensions | 20 x 18 x 14 inches |
| Manufacturer | RDS |
| Part Number | 72587 |
| Material | Aluminum |
| Model Number | 72587 |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: This product can expose you to chemicals including styrene which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov |
Listed on Amazon as: RDS Aluminum Auxiliary Fuel Tank – 20-Gallon, Rectangular, Smooth, Model# 72587
View on Amazon#6
6. VEVOR Waste Oil Drain Tank
- Capacity: 20 gallons
- Material: premium steel
- Weight: 30.9 lb
Best for: Shop waste-oil service bays.
Why it ranks #6: Its 20-gallon steel tank is an air-operated drain for used oil and fluids, with a 38–65-inch adjustable funnel; it is not a fuel caddy.
Air-operated drainage gives this VEVOR tank a service-bay role: it helps move waste oil without relying on a hand-operated pump. Its 20-gallon capacity is specified for up to 10 consecutive waste-oil treatments, while an adjustable funnel height accommodates different vehicle and lift heights.
The 38-to-65-inch height range lets operators position the funnel at different vehicle or lifting-equipment heights, supporting a closer connection during draining. Air operation provides the powered drainage method, and the 20-gallon capacity is specified for up to 10 consecutive treatments, reducing the need to empty the tank after each service. Wheels support portability around a shop, while the included hose, funnel, and pressure gauge provide the listed components for drainage and transfer work.
- 20-gallon capacity specified for up to 10 consecutive waste-oil treatments
- Air-operated drainage
- Funnel height adjusts from 38 to 65 inches
- Includes wheels, hose, funnel, and pressure gauge
- Air-operated drainage requires an available air supply.
Skip it if you need a fuel-storage caddy rather than a waste-oil drain; COZONY’s 20-gallon tank is listed for fuel storage.
For repair shops and garages draining waste oil from vehicles at varied lift heights, this VEVOR combines adjustable funnel positioning with air-operated drainage. Its role is waste-oil handling, and air operation makes an air supply an operating consideration.
Full product details
| Brand | VEVOR |
|---|---|
| Capacity | 20 gallons |
| Color | Red |
| Included Components | 1 x Hose 1 x Funnel, 1 x Oil Drain Tank 1 x Pressure Gauge |
| Item Weight | 30.9 pounds |
| Manufacturer | VEVOR |
| Material | premium steel |
| Model Number | 917 |
Avoid confusing a fuel tank with a waste-oil drain
The main mismatch to avoid is buying a waste-oil drain when you need a fuel transfer tank. The VEVOR Waste Oil Drain Tank is a 20-gallon steel vessel with an air-operated working principle and an adjustable 38–65-inch funnel, intended for draining, transferring, and evacuating oils and fluids. Its design and included funnel suit collecting fluid from a vehicle, not the mobile fuel-caddy role served by the TUFFIOM, COZONY, or VEVOR Fuel Gas Caddy.
The product information also describes the RDS Aluminum 74551 as intended for diesel and other nonflammable liquids, and the RDS Aluminum 72587 as a diesel auxiliary application. Do not assume all listed 20-gallon tanks can safely hold the same liquid.
Verify the manufacturer’s instructions and the permitted fuel or fluid before filling, and follow applicable rules for transport and use.
Match the tank format to the transfer route
A tank that travels with equipment and a tank mounted in a pickup bed solve different transfer problems. The wheeled caddies are designed for portable use and have manual pumps; the TUFFIOM also lists an 8.9-foot hose, while the COZONY specifies a two-way manual rotary pump. By contrast, the RDS Aluminum 74551 is a rectangular 50 x 21 x 7-inch tank with mounting brackets, described for moving diesel from a pickup to remote equipment.
Its shallow, wide dimensions are not the same form factor as a wheeled caddy. The RDS Aluminum 72587 is smaller in listed dimensions at 20 x 18 x 14 inches and is described for a generator or another specialty diesel application.
Before buying, compare where the tank will sit, how the contents will reach the equipment, and whether the intended installation and fuel match the product description.
How to Choose a 20-Gallon Transfer Tank
Fuel or fluid application
Start by checking that the tank is intended for the liquid and job you have in mind. The VEVOR Waste Oil Drain Tank is an air-operated oil drain, while the TUFFIOM and COZONY are portable fuel caddies. The VEVOR Fuel Gas Caddy is listed as compatible with gasoline and diesel.
For a pickup-bed transfer setup, the RDS Aluminum 74551 is described for diesel and other nonflammable liquids; the RDS Aluminum 72587 is described for diesel use with a generator or specialty application. A mobile fueling task favours a caddy with wheels and a pump.
A fixed or vehicle-mounted diesel transfer need favours an auxiliary tank designed for that role. Confirm allowable contents and installation requirements with the manufacturer.
Pump, hose, and mobility
Look at how fuel moves out of the tank and whether you need to move the tank itself. The TUFFIOM has a reversible manual siphon pump, an 8.9-foot hose, and wheels; the COZONY has a two-way manual rotary pump and wheels. The VEVOR Fuel Gas Caddy also has a bi-directional hand pump, but its listed product data does not specify an included hose.
These features favour mobile fueling where a powered connection may not be available. The RDS auxiliary tanks are a different format, with no pump listed in the supplied specifications.
Choose a wheeled caddy when you need to roll fuel to equipment; consider a truck-bed tank when the transfer route and installation suit that arrangement.
Material, dimensions, and handling
Compare tank material and dimensions with the space and handling demands of your setup. The COZONY caddy uses 201 stainless steel and weighs 51.2 pounds; the VEVOR Fuel Gas Caddy uses carbon steel and weighs 38.6 pounds. The TUFFIOM is alloy steel and weighs 25 kg.
Among the aluminum tanks, the RDS Aluminum 74551 measures 50 x 21 x 7 inches and weighs 80 pounds, while the RDS Aluminum 72587 measures 20 x 18 x 14 inches and weighs 30 pounds. A wheeled caddy may suit moving fuel around a work area, while an auxiliary tank’s dimensions and mounting format favour a compatible vehicle setup.
Check available space and handling needs before choosing.
Which 20-Gallon Transfer Tank Fits Your Setup?
For portable fuel dispensing, choose the TUFFIOM 20 Gallon Fuel Caddy: its reversible pump, 8.9-foot hose, and wheels suit moving fuel to equipment. The COZONY Portable Fuel Tank is another wheeled option, with 201 stainless steel and a two-way manual rotary pump. Choose the VEVOR Fuel Gas Caddy if you want a bi-directional hand pump and listed gasoline-and-diesel compatibility.
For transferring diesel from a pickup bed to remote equipment, the RDS Aluminum 74551 is the more relevant format; the RDS Aluminum 72587 is described for a generator or specialty diesel application. Skip the VEVOR Waste Oil Drain Tank for fuel storage: its air-operated funnel design is for collecting waste oil and fluids.
Confirm permitted contents and installation before use.
Frequently Asked Questions
Can a 20-gallon transfer tank carry gasoline, diesel, or both?
It depends on the tank’s stated compatibility; capacity alone does not establish which fuels it can hold. The VEVOR fuel gas caddy is listed for gasoline and diesel, while the TUFFIOM title identifies gasoline and diesel use. RDS 74551 is described for diesel and other nonflammable liquids.
Confirm permitted contents before filling.
What should I check before installing an auxiliary tank in a truck bed?
Check the tank’s permitted contents, dimensions and fit in your truck bed, and the manufacturer’s installation and securement instructions. Confirm that the intended transfer setup suits your equipment and use. The RDS 74551 is described as a pickup auxiliary tank for transferring diesel and other nonflammable liquids to remote equipment.
How do I safely transport and dispense fuel from a portable tank?
Follow the tank and pump instructions, confirm the fuel is permitted, and secure the tank for transport. Keep fuel away from ignition sources and dispense only with the intended equipment. The TUFFIOM caddy has a reversible manual siphon pump and an 8.9-foot hose; its wheels help move it around.
Which option suits transferring diesel from a pickup to remote equipment?
The RDS Aluminum 74551 is the more relevant format for that job: it is described as a 20-gallon rectangular auxiliary tank for transferring diesel and other nonflammable liquids from a pickup to remote equipment. The RDS Aluminum 72587 is instead described for a generator or specialty diesel application.
Is the VEVOR waste oil drain tank suitable for storing fuel?
No; the product is described as an air-operated waste oil drainer with an adjustable funnel for collecting oil and fluids. The article’s guidance is to skip it for fuel storage. Choose a tank whose stated contents match your fuel, and confirm permitted use before filling or connecting equipment.
Final Words
For mobile fuel transfer, the TUFFIOM caddy is the strongest fit in this group, combining wheels, a reversible manual pump and an 8.9-foot hose. If you need a pickup-bed format, consider the RDS 74551 for diesel transfer to remote equipment; the 72587 is described for generator or specialty diesel use. Match the tank to the permitted contents and intended installation, and avoid the waste-oil drainer for fuel storage.