Portable gas grills
1 lb Propane Cylinders vs a 20 lb Tank Adapter for Your Portable Grill
Most portable gas grills are built to run on small 1 lb propane cylinders. They're light and easy, but they run out quickly and the empties pile up. Adapter hoses let the same grill run off a standard 20 lb tank instead.
This guide compares the two setups on cost, convenience, portability and safety, and covers what to check before you connect an adapter to your grill.
Quick answer
- 1 lb cylinders are the most portable choice and need no extra parts, but cost much more per pound of propane.
- A 20 lb tank with an adapter hose gives far more cooking time and lower fuel cost, at the expense of weight and space.
- Only use an adapter hose your grill's manufacturer approves or that is specified for your grill's regulator type.
- Refillable 1 lb cylinders are an in-between option; refill them only through approved methods and equipment.
- For tailgates and car camping, many people carry a 20 lb tank plus one small cylinder as a backup.
How portable grills connect to propane
Most portable grills use a regulator that screws directly onto a 1 lb cylinder. The regulator reduces cylinder pressure to the level the burner needs. To run from a larger tank, you need an adapter hose that connects the tank's valve to the grill's regulator inlet, so the grill's own regulator still does its job.
There are different adapter designs depending on how your grill is plumbed. Some hoses connect to the grill's regulator in place of the small cylinder. Others replace the grill's regulator with a regulated hose. Using the wrong type for your grill can deliver the wrong pressure, which is why the manufacturer's guidance matters.
Side-by-side comparison
| Factor | 1 lb cylinders | 20 lb tank + adapter |
|---|---|---|
| Fuel cost per pound | Much higher | Much lower, especially with refills |
| Cooking time per container | Short; often a single cook session | Many sessions per tank |
| Weight and bulk | Light, small | Heavy and bulky when full |
| Extra gear needed | None | Adapter hose, sometimes a tank stand |
| Waste | Empties need proper disposal | Tank is refilled or exchanged |
| Best for | Hiking, picnics, short trips, small cars | Tailgates, car camping, RVs, backyard backup |
Compare current prices locally: the cost gap per pound is usually large, but it depends on where you buy cylinders and whether you refill or exchange tanks.
When 1 lb cylinders make sense
- You grill away from home only a few times a year.
- You carry the grill some distance from the car.
- Space in the vehicle is tight.
- You want zero hoses and the simplest setup.
Browse 1 lb cylinder carry cases on Amazon
When a 20 lb tank makes sense
- You cook for groups at tailgates or campsites.
- You run more than one appliance, such as a portable grill plus a camp stove.
- You use the portable grill at home regularly and are tired of buying small cylinders.
- You travel by RV or truck and have space to secure the tank.
A tank stand or base keeps a 20 lb tank stable and upright on uneven ground, and our tailgate grilling setup guide covers the rest of the rig.
Browse propane adapter hoses on Amazon
Choosing an adapter hose
- Check your grill's manual for an approved adapter or hose and any part number.
- Confirm whether your grill keeps its own regulator (most portable grills) or needs a regulated hose.
- Choose a hose long enough to keep the tank away from the grill's heat, but not excessively long.
- Look for hoses certified for propane use and with fittings that match your tank and grill.
- Avoid stacking adapters on adapters to make something fit.
What about refillable 1 lb cylinders?
Refillable small cylinders are sold as an alternative to disposables. They avoid the waste problem and can lower cost if refilled from a larger tank. Refilling needs care: use only cylinders designed and labeled as refillable, refill using approved equipment and the method the cylinder maker specifies, and never overfill. Standard disposable 1 lb cylinders are generally labeled not to be refilled, and refilling them is not safe. If you're unsure, have refillable cylinders filled at a propane dealer.
Safety for both setups
- Connect and disconnect with the grill off and cool, and keep the tank or cylinder upright.
- Leak-test new connections with soapy water as your manual describes. Bubbles mean a leak: turn the gas off and fix it before use.
- Keep the tank away from the grill's hot surfaces, and route the hose so nobody trips on it.
- Never use propane grills indoors, in tents or in enclosed spaces.
- Transport tanks secured upright in a ventilated area of the vehicle, never in a hot closed trunk for long periods, and remove them promptly.
- Store cylinders and tanks outdoors, not in a house or living space.
- Follow the manufacturer's instructions and local rules, including campground and stadium rules on propane.
Browse propane tank stands on Amazon
Disposing of empty 1 lb cylinders
Don't toss empty cylinders in household trash unless your local program says that's allowed. Many areas have hazardous waste collection or recycling options for small propane cylinders, and some retailers run take-back programs. Check your local solid waste authority for the rules where you live.
The practical hybrid
Many people settle on both: a 20 lb tank and adapter hose for the backyard and car trips, and a couple of 1 lb cylinders for picnics and as a backup when the big tank runs low mid-cook. A tank gauge or scale helps you know when that is coming; see our guide to propane tank gauges and level sensors.
Browse portable propane grills on Amazon
Other fuel setups worth knowing
Distribution posts and trees
Some campers and RV owners use a distribution post, which sits on top of a 20 lb tank and provides a port for a lantern plus an outlet for a hose. These can run a portable grill and a lantern from one tank. As with adapter hoses, match the parts to your grill and follow each manufacturer's instructions.
Smaller refillable tanks
Tanks smaller than 20 lb, such as 5 lb or 10 lb sizes, are a middle ground: lighter to carry, still far more fuel than a 1 lb cylinder, and refillable at many propane dealers. They use the same adapter hoses as a 20 lb tank in most cases. For tailgates or small cars, they can be the best of both worlds.
RV quick-connect ports
Many RVs have an external low-pressure propane port. Running a portable grill from it requires a hose and fittings designed for low-pressure connection, because the grill's own regulator isn't needed. Check your RV and grill manufacturers' guidance; mixing high-pressure and low-pressure parts is a common mistake.
How to choose
- Under four trips a year, little carrying distance: 1 lb cylinders.
- Regular tailgates or car camping: 20 lb tank or a smaller refillable tank with an adapter.
- RV travel: check for a quick-connect port and use matching parts.
FAQ
Can I hook my portable grill up to a 20 lb propane tank?
Many portable grills can run from a 20 lb tank with the right adapter hose. Check your manual for an approved adapter and make sure it matches your grill's regulator setup.
Is a 20 lb tank cheaper than 1 lb cylinders?
Usually much cheaper per pound of propane, especially if you refill rather than exchange the tank. Compare local prices for both to see the difference where you are.
Can you refill disposable 1 lb propane cylinders?
Disposable cylinders are generally labeled not to be refilled, and refilling them isn't safe. Use cylinders specifically made and labeled as refillable, and refill them only with approved equipment.
How long does a 1 lb propane cylinder last on a portable grill?
It depends on the grill's burner rating and heat setting. Check your grill's manual, which often gives an estimated run time on a 1 lb cylinder.
Bottom line
For occasional, carry-it-in grilling, 1 lb cylinders are simple and light. For tailgates, car camping and regular use, a 20 lb tank with an approved adapter hose is cheaper and lasts far longer. Whichever you use, check the manufacturer's guidance for adapters, leak-test new connections, keep tanks upright and away from heat, and dispose of empty cylinders through local programs.