[MikeAurelius]

Very easy to do.

Find out what size pipe you have. This is the most important part. Go down to the hardware store and purchase a brass "pipe thread to barbed hose" fitting. Be sure the fitting has a female thead to match the male thread on the pipe (or a male thread to match the female thread on the pipe) - all pipes have standard sizes, it is a matter of matching the pipe diameter - for example, a 3/4 pipe fitting will only fit on a 3/4 pipe.

If they don't have a barbed hose fitting for the pipe thread you need, it is permissible to use a size increaser or reducer to get to the size you need.

Typically, the barb end should be 1/4" to fit the RED hose for your torch. Simply cut off the "B" fitting on the hose.

You will additionally need some teflon pipe tape, all pipe threads must be wrapped to prevent leakage, and a hose clamp. I strongly recommend that you do not use a screw type hose clamp. These actually chew into the hose and will cut it. Use a pressure type clamp - these can usually be purchased from your local welding shop. They work by squeezing them with an end or diagonal cutter. Some of them have a screw on top which squeezes the clamp together - this is different from the type where the thread is actually part of the clamp - those type (threaded clamps) are the ones not to use.

Also, did the plumber put a fuel gas shut off at the end of this pipe? If he did not, you will also need to purchase one of those as well. Be sure it is rated for fuel gas and not just compressed air or water.