leak at hose bib skirt on to wall

[banderson510]

took off the hose bib, put it back on, now i have a leak coming out of the base of the skirt where it attaches to the wall. i was careful and used a pipe wrench and spanner, but i seem to have caused a problem... any advice?

 

[banderson510]

opened up the wall, looks like the galvanized pipe right before the copper elbow is super corroded. based on the moisture and rot around the area, i think it may have been a subtle leak for a while, and my tinkering with the hose bib cracked the corrosion open even more.

 

[phishfood]

Yup, the layer of plaster corroded the galvanized where it made contact with it. Concrete type materials against steel pipe is never a good idea.