Is there a reason there is a carb on a glass pipe?

[nikweiser]

some pipes if you hit them from the carb you can get fat hits.. my friends steam roller you hit it backwards and it riiiiips

nikweiser Reviewed by nikweiser on 01-13-2007. Is there a reason there is a carb on a glass pipe? I don't really understand the idea of the carb on pipes and the such... Do they make a difference if covered or not? Rating: 5