Clean the threads on the end of the gas pipe feed using a wire brush. Wipe around the threads with a damp rag.
Brush on thread compound around the gas pipe feed threads around all sides of the pipe.
Screw the end of the pipe burner onto the gas pipe feed thread by hand. Use a pipe wrench to tighten it into place.
Mix water and soap together. Dab the soapy water around the joint between the pipe burner and gas pipe feed with a small brush. Turn the gas on and light the burner. If any bubbles can be seen from the gas burner/pipe feed joint, turn the gas off and tighten the joint more with the wrench.