Carry your own diesel and stop chasing the pump with the Weather Guard 350-3-02 transfer tank. This 50 gallon L-shape tank is the compact member of the line, built from 12-gauge steel and finished in a clean brite white ARMOR TUF powder coat that fights rust and glare in the bed. The small stepped footprint drops against the bulkhead of a full-size bed and even fits many mid-size trucks, so you get on-board fuel without giving up the whole bed.
What's Included:
50 gallon L-shape steel transfer tank
Vented, lockable filler cap
Steel bed-plate mounting hardware with rubber isolation bushings
Reinforced filler neck and 2 in NPT pump port opening
Weather Guard installation instructions
Transfer pump, hose, nozzle and filter are sold separately
Features
Heavy 12-Gauge Steel Build Every panel is formed from 12-gauge steel and joined with an overlapping edge design that reinforces the corners. It is built to survive the vibration, weight and rough handling that come with life in a work truck bed.
Brite White ARMOR TUF Finish A brite white ARMOR TUF powder coat wraps the whole tank to fight rust, fading and chips. It shrugs off diesel spills, road salt and sun so the tank keeps looking sharp in the bed.
Baffled For Stable Hauling Interior baffles slow the fuel down as you drive, so a full tank does not slosh and shove the truck around. Less fluid motion also means less stress on the tank over the long haul.
Vented, Lockable Fill Cap The filler cap vents to prevent pressure build-up as diesel warms and moves, then locks to help keep your fuel secure on the jobsite or overnight.
Ready For Your Transfer Pump A 2 in standard NPT port accepts most 12V diesel transfer pumps up to 30 pounds, and a 3/8" drain port makes service and draining easy. Add a pump, hose and filter to fuel equipment right from the bed.
Compact L-Shape Bed Fit The small L-shape footprint sits against the bed bulkhead and pairs with Weather Guard Saddle and Gull Wing boxes. Rubber isolation bushings on the steel bed plate cushion the mount and protect both the tank and your truck, and the compact size leaves room for gear behind it.
Fitment & Compatibility
Truck Class
Example Trucks
Fit
Full-size 1/2-ton and heavy-duty
F-150 through F-350, RAM 1500 through 3500, Silverado/Sierra 1500 through 3500
✓ Yes, drops in with room to spare
Mid-size
Colorado, Canyon, Tacoma, Ranger, Frontier
● Often yes, measure bed and wheel-well clearance first
Compact and small
-
● Verify bed space, this is the smallest footprint tank
Fit guidance: This is Weather Guard's compact L-shape transfer tank, so it has the smallest footprint in the line at about 32" long by 30" wide by 22" tall. The stepped L-shape sits against the front bed bulkhead and leaves the rest of the bed floor open for tools and cargo. It drops easily into full-size beds and fits many mid-size trucks that have room across the bed. Always measure your bed and confirm clearance around the wheel wells before ordering, and factor in the added weight of a full tank against your payload.
Fittings and Ports: 2 in standard NPT pump port, 3/8" drain port
Pump Compatibility: Accepts most 12V transfer pumps up to 30 lb (Severe Series tank required for heavier pumps)
Approved Fluids: Diesel and hydraulic fluid only, not for gasoline or flammables
Weight: About 126 lb empty (134 lb shipping)
Mounting: Steel bed plate with rubber isolation bushings, hardware included
Warranty: Limited Lifetime
Made In: USA
Mounting Method: Bolt-through bed mount, drilling required
Installation
Type: Bed-mount, bolt-in · Time: About 1 to 2 hours · Tools: Drill and bits, wrench or socket set, tape measure, marker, and zinc-rich primer to seal any drilled holes · Difficulty: Moderate, DIY-friendly with basic hand tools
Set the tank in place against the bed bulkhead, mark and drill the mounting points, then bolt it down through the steel bed plate using the supplied rubber isolation bushings so the tank is cushioned from the bed. Coat any drilled holes with zinc-rich primer to prevent rust, especially on aluminum beds. Install the filler neck and vented cap, then add your transfer pump, hose and filter. Follow the Weather Guard installation instructions for exact hardware placement.
Resources
Everything you need for your Weather Guard 50 Gallon L-Shape Steel Transfer Tank, Compact, Brite White, in one place.
Warranty. Limited Lifetime Warranty from Weather Guard against defects in materials and workmanship.
Free shipping. This item ships free to the lower 48 states. Because it is an oversized item, it ships by freight and typically arrives in 3 to 7 business days.
Inspect on delivery. Please inspect the packaging before signing. If you see any damage, note it on the delivery receipt and contact us right away, and we will make it right.
Compliance. The Weather Guard 50 gallon L-Shape is a bed-mounted transfer and storage tank rated for diesel fuel and hydraulic fluid only. Weather Guard's own safety labeling on the tank calls out diesel use only and warns against filling it with gasoline or any other flammable liquid, which creates an explosion risk in a vented steel transfer tank. It is not designed or approved to be plumbed into a vehicle's primary fuel system as an auxiliary supply tank. Fuel is moved with a 12V transfer pump through the 2 in NPT port rather than by gravity feed, and Weather Guard recommends running a filter when pumping. Weather Guard does not publish a DOT approval number for these transfer tanks, so treat it as a transfer and storage tank, not a DOT-certified auxiliary fuel tank. Rules for hauling and dispensing fuel vary by state and by the quantity carried, so the buyer is responsible for confirming legal, compliant use. Gasoline is never approved for this steel tank and should not be stored or transferred in it.
About Weather Guard
Weather Guard has built professional-grade truck and van storage in the USA for decades and is the storage brand tradespeople, contractors, and fleets reach for first. Its steel and aluminum tool boxes, ladder racks, and van-interior systems are engineered to survive daily jobsite abuse and keep expensive tools secure and organized.
Known for weather-tight seals, patented locking systems, and heavy-gauge construction, Weather Guard products mount cleanly on work trucks and vans and stand up to years of hard use. The lineup spans crossover, low-side, and saddle truck boxes, ladder and van racks, drawer units, and fuel and utility tanks, so an entire work vehicle can be outfitted from one brand.
Backed by a strong manufacturer warranty and US-based support, Weather Guard is the name pros trust to protect the tools their livelihood depends on.
Authorized Weather Guard dealer. Prestige Truck is an authorized dealer of Weather Guard, so every tool box, rack and storage product you buy is 100% genuine and factory-new, covered by the full Weather Guard manufacturer warranty, and backed by our own US-based support team.
Compare The Range
How this compares to similar models
The closest alternatives side by side, so you do not have to keep tabs open.
Model
This OneWeather Guard 50 Gallon L-Shape Steel Transfer Tank, Compact, Brite White (350-3-02)
Diesel fuel and hydraulic fluid only. Weather Guard labels these steel transfer tanks for diesel use and warns against gasoline or any other flammable liquid, because those are not safe in a vented steel transfer tank. Keep it to diesel and non-flammable hydraulic fluid.
Can I use this as an auxiliary tank plumbed into my truck?
No. This is a transfer and storage tank, not a gasoline tank and not an auxiliary tank that plumbs into your truck's fuel system. It carries diesel in the bed and pumps it out to equipment or vehicles with a separate 12V transfer pump. Always confirm the fuel rules in your state before hauling and dispensing.
How big is this tank and what will it fit?
The 350-3-02 is the compact L-shape at about 32-1/4" long by 30" wide by 22" tall with a 50 gallon capacity, so it has the smallest footprint in the line. It drops into full-size beds with room to spare and fits many mid-size trucks. Measure your bed and check wheel-well clearance first.
How is the tank mounted?
It bolts down through a steel bed plate using rubber isolation bushings that cushion it from bed vibration. Plan to drill a few mounting holes, seal them with zinc-rich primer, and follow the included Weather Guard instructions. Most installs take one to two hours with basic hand tools.
Why choose the 50 gallon over a bigger tank?
The 50 gallon 350-3-02 gives you a full day of on-board diesel while taking up the least bed space and adding the least weight, which matters on half-ton and mid-size trucks. Step up to the 75 or 90 gallon L-shape tanks if you need more range between fills.
Where is this tank made?
In the USA. Weather Guard builds its steel transfer tanks in the United States and backs them with a Limited Lifetime Warranty against defects in materials and workmanship.
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