Propane

QCC1, Type 1, and what screws onto what

Propane fittings have two ends and they answer to different names. Sorting the tank end from the appliance end takes about a minute and saves a return trip.

Written on the bench, checked 2026-09-09

The tank end has one common answer

On a standard refillable barbecue tank in the United States, the valve outlet is a QCC1 connection. Type 1 is the same thing under a second name, so a hose sold as Type 1 and a hose sold as QCC1 will both thread onto the same tank.

You can identify it without a wrench, because a wrench is the point. The nut is a large plastic hand wheel, it threads on clockwise, and it seats against a soft face inside the valve. If the nut on your hose is metal, small, and turns the wrong way to tighten, you are looking at the older POL fitting, which threads into the inside of the valve and does need a wrench.

The small green cylinders are a third thing

The one pound camping cylinders that feed tabletop grills and portable stoves use their own smaller thread. Nothing that fits a barbecue tank fits them, and adapters that bridge the two go in a specific direction.

Read those adapters carefully. One kind lets a full size tank feed an appliance built for the little cylinders, which is what most people want for a long weekend. The other kind refills small cylinders from a big one, which is a different job with different rules.

The appliance end is where the variation lives

Once past the regulator, the fitting depends on what the manufacturer put on the grill. Flare fittings and pipe thread fittings look similar at arm length and are not interchangeable, because a flare seals on a machined cone and pipe thread seals on the threads themselves.

The reliable move is to look at the port on the grill rather than guess from the model. If the mating surface inside the fitting is a smooth angled cone, it is a flare. If the threads are slightly tapered and the port is plain, it is pipe thread. Our hose and adapter listings name both ends, so match the appliance end first and the tank end will nearly always be the standard one.

• Tank end on a refillable barbecue tank: QCC1, also sold as Type 1, plastic hand wheel, no tools.
• Tank end on older or industrial valves: POL, metal nut, threads into the valve, wrench required.
• Small camping cylinders: their own thread, bridged only by a marked adapter.
• Appliance end: flare or pipe thread, decided by the port on the grill.

Hand tight means hand tight

The plastic hand wheel is designed to be turned by hand until it stops and then a little firmer. Reaching for pliers crushes the sealing face, and a crushed face leaks at the one joint you cannot see.

After connecting, brush soapy water around the joint with the tank valve open and the grill off. Bubbles mean back it off and reseat it. No bubbles means you are done, and you should still repeat the check whenever the hose has been off the tank.