Recertified 6 lb. Aluminum Propylene Cylinder

No, and the difference matters before you buy. Propylene and propane are different fuel gases: propylene burns hotter, which is why it is favored for brazing and some cutting work, and torches and tips are often rated for one or the other. This is a propylene cylinder. If your equipment is set up for propane, check its rating before switching fuel.

Cylinder service is set by the supplier and by the valve and cylinder specification, so this is a question for your filler rather than an assumption to make. Do not switch a cylinder between fuel gases without confirming it is approved for that service. Using the wrong gas for your torch can also affect flame characteristics and safety.

Aluminum is lighter for the same capacity and does not rust, which is the main reason it is chosen for marine and outdoor mounting where a steel bottle would corrode. The trade is usually cost. For a cylinder that lives on a boat or on the outside of a vehicle, the corrosion resistance is the deciding factor.

Yes, that is its intended use. The high-strength aluminum alloy resists the corrosion that quickly attacks steel cylinders in a salt environment, and the open handle design is built for secure year-round mounting rather than occasional carrying. Always mount and vent a fuel cylinder on a vessel to the applicable marine standards.

It provides a fixed mounting point so the cylinder can be strapped or bracketed in place permanently, rather than being carried and set down like a grill bottle. On a boat or an off-road vehicle that matters more than portability. It also gives a secure grip when the cylinder is moved.

It means the cylinder was inspected and requalified by an authorized facility and passed, then returned to service with a current date stamped on it. It meets the same standard a new cylinder must meet, or it is scrapped. The difference from new is cost and cosmetic condition.

Yes, it is fitted with an OPD, an Overfill Prevention Device. United States refill stations will refuse to fill a cylinder in the sizes that require an OPD if it does not have one, so this is a practical requirement rather than an optional feature. It limits the fill level to leave the correct vapor space.

Roughly 1.4 gallons, since propane and propylene weigh in the region of 4.2 pounds per gallon. Cylinders are rated by pounds of capacity rather than tank volume, which is why a “6 gallon” tank would be a much larger vessel. Check the pound rating rather than searching by gallons.

Height, diameter and empty weight are listed in the specifications on this page. As a class, a 6 lb aluminum bottle is genuinely light and compact, which is the point of the aluminum construction. Check the listed height against your mounting bracket.

No. All cylinders ship empty for transport safety and must be filled before first use. Take it to a supplier who handles propylene and can fill by weight. Never attempt to transfer fuel gas between cylinders yourself.

Not every propane dealer stocks propylene, so it is worth confirming locally before buying. Welding and industrial gas suppliers are more likely to handle it than a general propane exchange point. Some suppliers operate an exchange rather than filling your own cylinder.

Typical uses are portable brazing and soldering, marine and boating applications, and outdoor or off-road setups where a light corrosion-resistant bottle is wanted. Propylene’s higher flame temperature suits brazing work that propane struggles with. The small size favours portability over run time.

Transport it upright and secured, and never leave a fuel cylinder in a closed vehicle or in direct sun. Store it outdoors or in a properly ventilated space, upright, away from ignition sources and building openings. Keep the valve fully closed when not in use, including when empty.