Re: Ross Bob
when people talk about a quality hookah generally it has one thing in common and that is a brass core. its bad and not bad at the same time. the heat from the coals is not going to cause it to reach the temperature where particles of it start to come off unless the hot coals are directly on it and seeing as that is fairly hard to do unless your jamming coals into the stem you should be fine. generally a brass core was seen as a better made hookah and it still should. they stopped using brass as much due to the prices of the metal.
if you want an experts opinion on the safety on it i say ask fursaken as he will have to be the guy who is more knowledgeable on this as he has a degree in metals.