The Tank Is Just the Beginning
You bought a transfer tank. Good. Now you need the accessories that make it actually functional — because a tank without a meter, pump, and filter is just an expensive bucket. Here are the four fuel system accessories every contractor should have in 2026.
1. Fuel Meter with Strainer
If you're not measuring your fuel, you're guessing. A GPI Mechanical Fuel Meter with Strainer gives you a 4-digit display for accurate measurement during every transfer. The integrated strainer catches debris before it reaches your equipment — and at $329, it pays for itself the first time it prevents a clogged fuel injector on a $15,000 generator.
GPI is the industry standard here. The mechanical design means no batteries, no electronics to fail in the rain, and a simple 4-digit readout that anyone on the crew can read.
2. Hand Pump for Backup
Electric pumps are great — until the battery dies or the wiring corrodes. A GPI Deluxe Dual Flo Hand Pump moves 50 gallons per 100 strokes, which is slow but reliable. It's your insurance policy for when the electric pump quits on a remote site with no parts store within 50 miles.
Our top-rated pick for this category. Available at Big League Accessories with 30-day returns and expert support.
3. Filter Kit
A GPI Filter Kit with a 10-micron filter is non-negotiable if you're storing fuel for more than a week. Condensation, sediment, and microbial growth happen — it's not a question of if, but when. The cast iron adapter and nipple make installation straightforward, and at $96, it's the cheapest insurance you'll ever buy for your equipment.
4. Lockable Fuel Cap
The ATI Fuel Cap Vented Lockable is the accessory nobody thinks about until their fuel gets siphoned. At $32, it's the cheapest item on this list and the one that prevents the most expensive problem. The vented design prevents vacuum buildup, and the lock keeps your fuel where it belongs.
Bottom Line
Your transfer tank is the heart of your fuel system, but these four accessories are the veins and arteries. A meter tells you what you're using, a pump gives you options, a filter protects your equipment, and a lock protects your fuel. Skip any one of them and you're rolling the dice on a job site.
