Remote Fuel Tank Fill Kit
How to Install a Remote Fill Point for an Auxiliary Fuel Tank
Running a fuel tank inside a trailer, shed or truck body? Put the fill point on the outside wall, behind a locking door. We supply the filler neck, the cap, the bezel and the door: everything you see from the outside, from the makers of The RV Fuel Vault.
What's in the Kit
Four parts, one box, matched to fit together.
Filler neck
Brings the fill point from the tank line out to the exterior wall.
Fuel cap
Seals the filler neck behind the door.
Mounting bezel
Frames the wall cutout for a clean, factory-style finish.
Locking door
Hinged door with a tamper-resistant keyed lock and 2 keys, so nobody fuels up (or siphons) without you.
You supply: the tank, fuel-rated fill hose, clamps and any vent line your tank requires. Only need a locking access door with no fuel parts? See our standard locking hatches.
Where a Remote Fill Point Makes Sense
Enclosed & landscape trailers
Fill an onboard tank for mowers, ATVs or equipment from outside, without opening the ramp or side door.
Toy haulers & jobsite trailers
Give an auxiliary fuel cell a dedicated, locking exterior fill point.
Sheds, barns & outbuildings
An exterior fill point for an approved storage tank, where local code allows fuel storage in the structure.
Work truck bodies & equipment enclosures
Relocate the fill point of a transfer or auxiliary tank to a reachable, lockable spot.
How to Install a Remote Fuel Fill Kit
- 1
Pick the fill location
Choose an exterior spot that is easy to reach with a fuel nozzle, clear of studs, wiring, doors and heat sources, and as close to the tank as practical so the fill hose run stays short and slopes down to the tank.
- 2
Confirm the tank connections
Check your tank manufacturer's instructions for the fill inlet size, venting and grounding requirements. The tank, fill hose, clamps and vent are supplied by you and must be rated for the fuel you are using.
- 3
Mark and cut the opening
Use the true-scale printable template on our Find My Cutout page to mark the wall, then cut the opening. Measure twice: the cutout must match the template exactly.
- 4
Mount the bezel and door
Set the bezel in the opening and fasten it with the included security screws using fasteners suited to your wall material (aluminum, steel, fiberglass, plywood, T1-11).
- 5
Install the filler neck and cap
Secure the filler neck behind the door, then connect the fuel-rated fill hose from the neck to the tank inlet with proper clamps. Keep the hose free of kinks and low spots.
- 6
Check before the first fill
Verify every connection is tight, the vent is clear, and there are no leaks. Lock the door with the included key. Fill slowly the first time and inspect again.
Safety first. Fuel systems must follow your tank and hose manufacturers' instructions and the codes that apply where you live and drive. Rules for carrying fuel in trailers and storing it in buildings vary, so check with your local fire marshal or building department. If you are not comfortable working with fuel lines, have a qualified installer do it.
Why a Locking Door
- Discourages fuel theft and tampering
- Hides the cap for a clean, finished wall
- Rot-free 3/16" fiber-filled, UV-stabilized polymer
- Limited lifetime warranty, made in the USA
Building Trailers or Sheds?
Trailer manufacturers, upfitters and shed builders can offer the fill kit as a factory option for buyers who carry equipment fuel. Keyed-alike setups are available so one key opens every hatch on a unit.
See the builder programRemote Fuel Tank FAQ
What comes in the LockingHatch remote fuel fill kit?
The kit includes the filler neck, the fuel cap, the mounting bezel and the locking door with a keyed lock, 2 keys and security screws. You supply the tank, the fuel-rated fill hose, clamps and any vent line your tank requires.
Can I add a remote fill point to an auxiliary fuel tank in an enclosed trailer?
Yes. A remote fill kit lets you fill an onboard auxiliary tank from the outside of an enclosed cargo, landscape or toy hauler trailer, so you do not have to open the trailer or carry fuel cans inside. Follow your tank manufacturer's instructions and any rules that apply to fuel carried in your trailer.
Can I put a fuel fill door on a shed or barn?
It can be used as the exterior fill point for an approved fuel storage tank inside an outbuilding where local code allows it. Fuel storage rules vary by location, so check with your local fire marshal or building department before installing.
Why use a locking fuel fill door instead of an open fill pipe?
A locking door hides and protects the filler cap, discourages fuel theft and tampering, and gives the wall a clean, finished look instead of an exposed pipe.
Who makes the remote fuel fill kit?
LockingHatch is from the makers of The RV Fuel Vault. The doors and bezels are made in Sarasota, Florida, from 3/16" fiber-filled, UV-stabilized polymer and carry a limited lifetime warranty.
How do I order a remote fuel fill kit or price one for production?
Use the inquiry form on this page. Tell us what you are building, how many units and where the tank sits, and a real person will reply within one business day with kit details and pricing.
Get Remote Fuel Fill Kit Pricing
Tell us what you're building and how many kits you need. A real person replies within one business day.