Flame King Propane Refill Fitting Adapter Valve for 1LB Camp
✅ PROS
- Solid brass construction with a hand-tightened knob — no tools needed, seals reliably every time
- Includes a built-in bleed valve that releases trapped air, which is essential for a complete refill
- Weighs under 4 ounces, so it's easy to keep in your camp kit without adding bulk
❌ CONS
- Only works with refillable 1LB tanks — standard disposable green Coleman tanks will not accept a refill safely
- Requires a 20LB bulk tank with a standard ACME thread; won't fit tanks with older or non-standard valves
The Verdict
If you camp, tailgate, or run a propane lantern for more than a few weekends a year, you already know the pain: buying those little green 1LB cylinders at $6–$8 a pop adds up fast. The Flame King Propane Refill Fitting Adapter Valve promises to let you refill those small tanks from a standard 20LB bulk tank, cutting your fuel cost by roughly 75%. After digging through the specs, the 229 ratings, and the real customer feedback, here’s the honest picture.
What You Actually Get
The package is refreshingly simple: one brass adapter valve, a rubber O-ring pre-installed, and a small plastic bleed valve already threaded into the body. There’s no instruction booklet worth mentioning — the product image shows the whole setup, and the process is intuitive enough that most users figure it out in under two minutes. The valve measures about 3 inches long and weighs just 3.8 ounces, so it disappears into a camp bin or tool pouch.
Performance and Real-World Use
The adapter works by connecting your 20LB tank’s ACME thread (the big nut you turn by hand) to the small threaded valve on a refillable 1LB cylinder. You open the bulk tank valve, fill the small tank, then crack the bleed valve to vent trapped air before disconnecting. That bleed valve is the key detail — without it, you get a partial fill and a frustrating mess.
Customer feedback consistently confirms this works as intended. One verified buyer noted, “I’ve refilled the same 1lb tank at least 15 times now. It fills to about 80%, which is exactly what you want for safety.” Another user praised the build: “The brass feels substantial, not like the cheap aluminum ones that strip after a few uses.”
The math is compelling. A 20LB refill costs around $15–$20. That fills roughly 15–18 one-pound cylinders. At store prices, those same cylinders would run you $90–$140. The adapter pays for itself on the first two tanks.
Where It Falls Short
The biggest catch: this only works with refillable 1LB tanks. Standard disposable Coleman-style green cylinders are not designed to be refilled, and attempting to do so is both dangerous and often physically impossible because the valve construction differs. Flame King and a few other brands sell refillable 1LB tanks specifically for this purpose — you’ll need to buy those separately.
A second limitation: the adapter requires a 20LB bulk tank with a standard ACME thread (the large green nut). If you have an older tank with a POL valve (the left-hand threaded one), this won’t connect without an additional converter. Also, a few users mentioned that over-tightening the hand knob can warp the O-ring over time, so use firm hand pressure, not a wrench.
Who Should Buy This
- Frequent car campers who use lanterns or stoves for a week or more per season — you’ll break even within two trips.
- Tailgaters who burn through a 1LB tank every game day.
- RV owners who want to fuel a portable grill without hauling a 20LB tank around the campsite.
- Skip it if you only use propane a few times a year — the upfront cost of refillable tanks plus the adapter may not be worth it for occasional use.
FAQ
Is it legal/safe to refill 1LB tanks? Yes, when using certified refillable cylinders. The DOT-approved refillable tanks from Flame King and similar brands are designed for this exact purpose. Never attempt to refill a disposable green cylinder — the valve isn’t designed for repeated pressurization cycles, and it’s a serious safety hazard.
How do I know when the tank is full? Weigh the tank before and after. A full 1LB tank weighs about 1.4 pounds more than empty. You can also listen for the flow to slow — but weighing is the reliable method.
Will this fit my propane tank? It fits any standard 20LB tank with an ACME thread (the big green nut). If your tank uses a POL valve, you’ll need an adapter. Check your tank’s valve type before ordering.
The Verdict
Buy it if you regularly use 1LB propane cylinders and want to cut your fuel costs by two-thirds or more. The brass build is solid, the bleed valve design is thoughtful, and the math works in your favor after just a couple of fills.
Skip it if you’re a once-a-year camper, or if you’re not willing to buy refillable 1LB tanks to pair with this adapter.
Rating: 4.6/5 — It does exactly what it claims, with a durable build and smart design. The only reason it’s not perfect is the requirement for compatible refillable tanks, which adds an upfront cost that some shoppers won’t expect.
As shown in the product image, the brass valve and bleed mechanism are straightforward — but pair this with a certified refillable tank, and you’ll stop throwing money away on single-use cylinders.
Where to Buy
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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.