I live in Bolivia, I made a search trying to find not galvanized nipples for the air vents but I couldn´t find them and I couldn´t find black pipe either.
Is there a health danger in using galvanized nipples for air vents? I suppose air vents nipples doesn’t get too hot but I am guessing.
(I tried in hardware shops, welders, even spoke with an hardware shop owner: only galvanized ones are available)
Edited by GACP - 7/15/13 at 12:58pm