My experience with British pipes, old and new, is good. I don’t think I’ve ever messed with the airway on one. Old American factory pipes are generally good, but I have had some with oddly narrow shank airways that I eventually widened. American stems are pretty standard. But those old bone coarse threaded tenons come in a variety of airway sizes. Some of them are ridiculously small. I often find them on lightly smoked pipes and I think that’s why. Italian pipes are generally good but the occasional acrylic stem pops up with an oddly tight airway. Sometimes an airway gets flattened when it’s bent.
So if you deal in a wide variety of estate pipes, you might sometimes come across a restricted airway. It isn’t usual or endemic to a particular brand I’m aware of. It just happens. Somebody made a mistake. A bad one went through. I get the feeling that people would smoke a pipe a few times and if it didn’t smoke the way they liked, it ended up in a drawer.
I have never altered an artisan pipe. The attention to the airway is one element that makes those desirable.
So if you deal in a wide variety of estate pipes, you might sometimes come across a restricted airway. It isn’t usual or endemic to a particular brand I’m aware of. It just happens. Somebody made a mistake. A bad one went through. I get the feeling that people would smoke a pipe a few times and if it didn’t smoke the way they liked, it ended up in a drawer.
I have never altered an artisan pipe. The attention to the airway is one element that makes those desirable.