Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
You refill a 20-pound propane cylinder instead of replacing it, so it has to fit your grill, heater, or camper bay without a fight. The short answer: the Flame King YSN-201 is the safest all-round buy for most people, the 20 lb steel cylinder with an OPD valve (a safety valve that stops the tank from overfilling) is the value play, and if you are squeezing a tank into a low fire pit or a truck camper, a horizontal model is the only shape that works.
I’m Mohammad Maruf — the founder and writer behind KitchPrep. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
You will see which tanks carry an OPD valve, how a tare weight changes what you can lift, and why a gauge saves you a mid-barbecue run. Every pick below is a refillable steel LP cylinder built for grills, patio heaters, camping, and RV use, and this rundown of the 20 gallon lp tank covers the shapes and valve types that actually fit real equipment.
Our Picks at a Glance
Tare Weight and Total WeightCheck Price on Amazon
How To Choose The Best 20 Gallon LP Tank
Start with the shape your equipment needs, then work back to the valve and the weight. A vertical cylinder fits a standard grill or patio heater; a horizontal cylinder is the only safe option for a low fire table or a camper bay that lays the tank flat. After shape, the two things that decide whether your tank gets filled without hassle are the OPD valve and the OPD valve’s condition.
OPD Valve Is Not Optional
An OPD (overfill protection device) valve is a float inside the tank that stops the fill before the cylinder is overfilled. Many states require it, and most fill stations will turn you away without one. Every tank on this list ships with a factory-installed OPD valve, so this is one box you can check off the moment you buy.
Tare Weight and Lifting
Tare weight is the empty tank’s own mass, before any propane goes in. A lighter empty tank is easier to lift onto a grill shelf, into a truck bed, or onto a camper hitch. It also means less strain when you swap a spent tank out mid-cookout.
Gauge or No Gauge
A built-in gauge reads the fuel level so you can decide whether to refill before you light the grill. It is a convenience feature, not a requirement, and buyers report it reads as a rough range rather than a precise level. If you have ever had a burner die halfway through a cookout, it is worth the weight.
Refill or Exchange
Swapping a tank at a store gets you a generic, possibly partially filled cylinder. Buying your own tank and refilling it by weight or by gallon lets you keep a known, well-kept cylinder. The tradeoff is you now own the recertification and upkeep — but you also control the tank’s condition.
Quick Comparison
| Model | Best For | Capacity | Empty Weight | Built-In Gauge | Amazon |
|---|---|---|---|---|---|
| Flame King YSN-201 | All-round grilling and heaters | 20 lb | 18 lb | No | Amazon |
| New 20 lb Steel LP Cylinder | Best value pick | 20 lb | 22 lb | No | Amazon |
| U-Haul 20 lb Propane Tank | POL and QCC compatibility | 20 lb | — | No | Amazon |
| Flame King YSN230a with Gauge | Gauge-first buyers | 20 lb | 16.81 lb | Yes | Amazon |
In‑Depth Reviews
1. Flame King YSN-201 20-Pound Steel Propane Tank Cylinder with Type 1 OPD Valve, White
The everyday grilling tank that does the boring job perfectly — 20 pounds of propane, an OPD valve, and nothing to figure out.
If your propane life is a gas grill, a patio heater, and the occasional camping stove, this Flame King is the one to start with. It is a 20-pound steel cylinder with a factory Type 1 OPD valve (the overfill protection device that most states require and that many fill stations check for). The steel body is welded, powder-coated white, and X-ray and hydrostatic tested per the maker’s spec sheet. At 18 pounds empty, it is the lightest of the standard vertical tanks on this list — easy to hoist onto a grill shelf or into a truck bed.
What keeps this tank in service is the powder-coated steel and Type 1 OPD valve holding up over years of refills, not one standout spec. Owners mention that the powder-coated finish resists rust and scratches, that the Type 1 OPD valve connects with standard hoses and fittings without leaks, and that the tank refills or exchanges anywhere a standard 20-pound cylinder is accepted. One owner sums up the spirit of the thing pretty well: “It’s a propane tank. New and shiny.”
The catch is lifespan. This tank goes out of certification after a set period and needs recertification to keep going — customers note getting closer to eight years of service out of a tank with a stated twelve-year life expectancy, and a few mention their tank arrived new but needed recertification sooner than they expected. That is the nature of a steel propane cylinder, not a flaw unique to this model, but it is the spec to plan around. Refilling your own tank every year or two, rather than swapping at a store for a generic, keeps this pick working best.
What earns the top spot
- Lightest standard vertical tank here at 18 lb empty — easier to lift and position.
- Type 1 OPD valve and DOT-approved build means most fill stations accept it on the first try.
- Powder-coated white steel resists rust and scratches through a season of patio use.
What to know going in
- Certification lifespan runs shorter than the tank’s stated twelve-year expectancy in real use.
- No built-in gauge — you will rely on the refill weight or a tank scale to know the level.
Pick this if: you want one no-drama tank for a grill, a heater, and the occasional camping trip, and you like the lightest lift in the standard shape.
Think twice if: you want a built-in gauge or need a horizontal fit — that is a different model’s job.
2. New 20 lb Steel Propane LP Cylinder with OPD Valve
Collared handles, 20 pounds of propane, and a stick-straight purpose: fill it, carry it, cook.
The headline number here is the shape. The 20LBLPG measures 12.3 inches in diameter by 17.4 inches tall — a stubby profile that fits tighter bays than the Flame King YSN-201, which stacks up at 17.4 x 17.4 x 12.3 inches for a wider overall footprint. That 5.1-inch narrower body is the reason people pick this one when space is tight under a shelf or in a camper slide-out. The tradeoff is weight: at 22 pounds empty, this tank is 5.19 pounds heavier to lift than the 16.81-pound Flame King gauge model, so fill it before you have to move it around too much.
What buyers talk about most is the build quality — the 3/4-inch NGT threaded OPD valve, the sturdy collar handles, the 240 PSI service pressure, and the shot-blasted, powder-coated white finish. Owners commonly fill this by weight or by gallon at U-Haul and similar suppliers, which is how you know you are getting a full tank instead of the partial refill a swap bottle often hands over. As owners put it, they like filling their own rather than exchanging.
The honest trade-offs: most tanks arrive ready to fill, but a few need a quick purge at the shop before the first fill. Neither is reason to skip it — a fresh steel cylinder can need a little prep on the first fill.
Where it lands: a solid, quiet workhorse for anyone who refills rather than exchanges. The collar handles, standard fittings, and price tier make it an easy default second tank.
Fits best: a second tank in the garage, a camper shelf, or any spot where a few extra dollars stay in your pocket.
Alternative if: you want the lightest carry or a built-in gauge — the YSN230a weighs less and shows the level.
3. U-Haul 20 lb. Propane Tank — POL and QCC Compatible
Built by an industrial tank maker, sold under a name you already know from the fill station.
U-Haul’s 20-pound cylinder is made by Worthington Industries, and it stands 17.8 inches tall with a 12.3-inch diameter, holding 20 pounds of capacity — roughly 4.6 gallons depending on fill temperature. what separates it is the valve end: it accepts both POL (a left-hand threaded fitting) and QCC (a newer snap-on connector) attachments, so older hoses with a left-hand threaded POL fitting and newer QCC snap-on connectors both work without an adapter. That flexibility matters if you own a mix of older and newer gear.
Reviewers point out the nitrogen-purged interior means fillers do not always need to purge it before the first fill, saving a shop trip. The easy-to-grip handles and standard dimensions make it a natural fit for gas grills, fire pits, and camping trips. On the gauge front, owners note the level indicator works as a rough guide — some see it go from empty to full and trust it, others find it shows refill range while the tank still takes a fair bit of propane, so treat it as a rough signal rather than a precise scale.
There is a rare caution to know about: one or two owners have reported a valve sticking after filling, leaving them with a full tank they cannot use until it is resolved. This is uncommon, but it is the kind of thing worth checking right after the first fill, while the shop still has eyes on it. As a preventative, check for leaks with soapy water after each fill and you will catch most issues early.
The real reason to pick it: POL and QCC compatibility makes this the most plug-and-play tank on the list for a mixed collection of hoses and older appliances.
Small thing worth knowing: it ships empty by law, and a filler will need to purge it if they do not trust the factory nitrogen purge.
Reach for this if: you run older gear with POL fittings alongside newer QCC equipment and want one tank that handles both.
Look elsewhere if: you want a light empty tank or a long factory warranty trail — this is a straightforward, well-made cylinder without extras.
4. Flame King 20LB Steel Propane Tank Cylinder with Overflow Protection Device Valve and Built-in Gauge
A gauge on the collar so you stop guessing whether you have enough propane to finish the cookout.
For anyone who has fired up a grill only to have the burner sputter out halfway through, this is the tank. The YSN230a builds a gas-level indicator into the collar, so you can read the level before you commit to cooking. It is not a lab instrument — the maker and owners both describe it as a helpful guide rather than a precision read — but the point is you will not be surprised mid-flip. At 16.81 pounds empty, this is the lightest tank on this list, which makes a real difference each time you swap it out.
Owners still cite functionality and value as the two things that keep this tank on the short list, and the 4.1-gallon fill capacity the maker lists has been the difference between a grill season and a grill session for plenty of buyers. It self-purges before filling, so most fill stations will take it as-is, and the powder-coated welded steel body resists rust season to season.
The honest caveat: at 17.4 inches tall, this tank can sit on the ground under a Weber 2-burner grill instead of hanging on its tank hanger. Specifically, the tank is tall enough that it can sit on the ground under a Weber 2-burner grill rather than hang on the grill’s own tank hanger, which can tether the grill in place. For most buyers, though, the trade is worth it — the tank is lighter, the gauge is right there, and the OPD valve and DOT certification clear the fill-station check.
The wins
- Built-in gauge on the collar — no more guessing before you light the grill.
- Lightest empty weight on the list at 16.81 pounds.
- Factory OPD valve and X-ray, hydrostatic-tested DOT and Transport Canada certification.
The trade-offs
- Taller than some small grills’ tank hangers — may end up sitting on the ground under a Weber 2-burner.
- Gauge reads as a range, not a precise number, so it is a guide rather than a scale.
Best when: you want to know at a glance whether the tank needs a refill, and you want the lightest lift of any standard vertical cylinder here.
skip it if: you run a small grill where the tank hanger matters more than a gauge reading.
5. Flame King YSN201HZL 20-LB Steel Horizontal Propane Tank Cylinder for Fire Pits and Tables, Patio Heaters, Barbeques, RVs, and Truck Camled properly, and that is why a “20 gallon” tank name can be confusing — the industry spec is 20 pounds, not 20 gallons. The practical result is a tank that runs a standard gas grill for roughly a season of regular weekend cooking, or a patio heater through a long stretch of cool evenings.
Tare Weight and Total Weight
Tare weight is the empty cylinder’s own weight. Add the full fuel weight and you get the total weight you are actually lifting. A 16.81-pound tare like the Flame King gauge model feels lighter than a 25.5-pound tare like the 30-pound horizontal tank, and the difference shows up every time you move the tank. If you carry your tank up stairs or across a yard, tare weight is the spec to compare, not just capacity.
FAQ
Is a “20 gallon” LP tank the same as a 20 pound tank?
Will a 20 lb propane tank fit under my Weber 2-burner grill?
Do these tanks come filled with propane?
How long does a 20 lb propane tank last before it needs recertification?
Can I lay a vertical propane tank on its side to fit a fire pit?
Are the built-in gauges accurate?
What is the difference between POL and QCC connections?
Do I need an OPD valve to get my tank filled?
Can I use a 20 lb tank with a fire pit rather than a grill?
Is it worth buying my own tank instead of exchanging at a store?
Final Thoughts: The Verdict
For the typical grill-and-heater owner, the 20 gallon lp tank winner is the Flame King YSN-201 because it pairs a factory Type 1 OPD valve (a safety valve that stops overfilling) and DOT-approved build with the lightest empty weight in the standard vertical shape, at 18 pounds. If you want the value play, grab the New 20 lb Steel Propane LP Cylinder with its 3/4-inch NGT OPD valve and sturdy collar handles. Reach for the Flame King YSN230a if a built-in gauge and the lightest lift are what you care about. And for a fire pit, camper bay, or any setup where the tank has to lay flat, the Flame King YSN201HZL horizontal tank is the one.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of September 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
As an Amazon Associate, KitchPrep earns from qualifying purchases. This does not affect which products we feature.
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