Re: Is there such thing as a non removable stem?
Do you mean it's stuck on the base? or that the stem does not come apart into seperate pieces?
On handmade hookahs, the stem is all soldered together to basically be one piece; this includes the Shaft, Heart, downstem, hose port, purge valve.
With Factory-manufactured hookahs, the stem can be unscrewed, as most pieces on the hookah can as well.