

🔥 Fuel your adventures safely and smartly with Flame King!
The Flame King YSN401 is a premium 40 lb steel propane tank featuring a legally required Overflow Protection Device valve, certified for safe transport in the US and Canada. Built with durable, rust-resistant materials and a standard connection valve, it’s perfect for RVs, heaters, and other propane-powered gear—combining safety, capacity, and reliability for the modern professional on the go.













| Best Sellers Rank | #6,680 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #13 in Heaters & Heater Accessories |
| Customer Reviews | 4.6 out of 5 stars 824 Reviews |
A**D
Good tank
Arrived in good shape. A bit heavy once filled, but still able to maneuver it as needed. Bought these for use with my portable tri-fuel generator. Propane lasts forever whereas gasoline goes bad over time so I decided this was a good investment to store the propane until it's needed.
T**H
Well made
Well made
E**N
Heavy-Duty Tank That Does Its Job
The Flame King 40-lb tank feels solid, filled easily, and the valve works smoothly. No leaks, no issues—just heavier to move around than smaller cylinders. So far it’s performed exactly the way I expected.
Y**B
Nice propane tank, good size for all around use
I purchased this additional propane tank for my gas/propane generator for emergency use. I really like the size of the 40lb tank as it's fairly heavy when full, but definitely manageable. Shipping arrived in a large box, with little packing material, but no dents and or major issues. I should note it was white paint only, no decals for Flame King, etc. I was able to get it filled over this past weekend, no issues. I was able to get this 40lb and my smaller 20lb filled for $49 w/tax, which is pretty reasonable. I'm now set with 60lbs of propane along with a few 5 gallon tanks of gas in case of power outages as winter continues.
D**D
Good quality
High quality used for generator. It serves it purpose.
A**R
Little small
Good little small but good
A**R
Good price
Great price & the size we needed. Top part around nozzle came bent but we needed it when we got it & didn't have time to have it replaced
K**.
Perfect size tank
Haven't had it filled yet but tank was completely undamaged and driver left it exactly where instructed. This is my 4th tank for patio heater and so far all is good with the other 3.
Trustpilot
3 weeks ago
2 weeks ago