Blog by Steve Laug

I was working on a stem for a friend this evening. The bowl on the pipe had a great wide open draw. The stem by itself was awful – it was like sucking on a coffee stirrer. It was a Aerosphere pipe. He had plugged the carburetor which was good. Somehow the stem itself was not drawing. I heated it and straightened it. I pushed a pipe cleaner through the straight stem and a chunk of some kind of fabric fell out. I used a light and looked down the stem and saw that the airway was a half circle. I used a needle file to open it up and to open the slot on the button as well. I then reheated with a pipe cleaner inserted to keep the airway open and then bent it so as not to kink the stem. The draw is wide open now. This caused me to post here regarding opening airways on bent stems.

Here are a few things to consider:
1. Is there anything in the stem itself clogging the airway? Could be a chunk of pipe cleaner lint, or fabric or just plain gunk.
2. Is the button open or is the slot on it constricting?
3. Is there a kink in the airway caused by the bend itself? This can happen when the stem is bent too far for the thickness of the stem at the bend.
4. What is the shape of the airway from shank to button? Round? Oblong? Oval? half circle? Check it before you drill it?

Anyway just a heads up – check before you drill it open.