David Nebenzahl wrote:
On 1/21/2011 9:58 PM RicodJour spake thus:

I would not mix galvanized and black iron directly, even if it's
allowed, as that accelerates corrosion. You'd have to use a
dielectric fitting.

Now *that* makes my BS meter twitch just a mite: why would there be
corrosion? Galvanized pipe is zinc over steel, so galvanized + steel
(black) should be no problem, right?

To rephrase what you said, if zinc + steel = corrosion, than a galvanized
pipe should disintegrate just sitting on the rack.