Galvanized fittings are commonly substituted in runs of copper tubing/brass fittings plumbing. Accordingly, even those houses that were not plumbed with galvanized are likely to still have some.


Full-size version

Hot on right, cold on left. Supply lines were galvanized


Supply lines


Corrosion scales on galvanized pipe with brass connectors. Note (1) accelerated corrosion at junction of dissimilar metal an (2) heavier scale with tuberculation on cold side (upper) in contrast with more subdued topology on hot side (lower)


02_FB07 - cold side enlarged